Research Database

Towards Sustainable Nitrogen Use Connecting Human Society and Nature

Last Updated :2026/02/25

Basic Information

Basic information

Project Status	Full Research (FR)
Duration	Apr. 2021 - Mar. 2028
Research Program	Co-creation of the Earth-human System Program
Project No.	14200156
Project Title	Towards Sustainable Nitrogen Use Connecting Human Society and Nature
Abbreviated Title	Sustai-N-able
Project Leader	HAYASHI Kentaro
URL	https://www.chikyu.ac.jp/Sustai-N-able/index.html
Keywords	Nitrogen issue; Nitrogen use; Nitrogen pollution; Nitrogen cycling; Sustainability

Progress and Results (2025 Year)
　
Research purpose and content
1.Executive summary

1) Objectives and background

Sustai-N-able (SusN) Project targets the nitrogen (N) issue, in which the benefits of N use such as fertilizers, industrial materials, and, more recently, energy sources as well as the use of fossil fuels as energy sources, give rise to the threats of N pollution across global to local scales (Fig. 1). The objective of SusN is to focus primarily on Japan while collaborating with related activities both domestically and internationally, to contribute to the development of universal and globally applicable methods for assessing the N issue, future scenarios, and the underlying scientific knowledge that supports them. Through these efforts, SusN aims to support action plans for international and domestic N management and ultimately to achieve the resolution of the N issue by 2050, together with the realization of food equity and the health of both humanity and nature. SusN tries to achieve the following three breakthroughs during 5-year period: (1) developing a framework to visualize the N-use benefits and N-pollution threats based on scientific knowledge of the driver–pressure–state–impact–response (DPSIR) of the N issue (N-DPSIR), (2) promoting recognition of the N issue among diverse stakeholders (N Recognition), and (3) designing sustainable N use for future generations (Future N Design).

Fig. 1. Nitrogen issue is a tradeoff between nitrogen use (benefits) and nitrogen pollution (threats).

N pollution causes various impacts such as climate change, stratospheric ozone depletion, air and water pollution, eutrophication, and acidification. In the world in 2010, the benefits of N use were estimated at 2.2 trillion USD, whereas the damage costs due to N pollution were at 1.2 trillion USD (Fig. 2; van Grinsven et al., 2025). The amount of anthropogenic creation of reactive N (Nr, N compounds other than dinitrogen [N₂]) now exceeds the natural creation by biological N fixation (Fowler et al., 2013). However, the N use efficiency (NUE) of human activities is low, ca. 20% in the world (Sutton et al., 2013). A large amount of N waste is eventually generated, part of which is lost to the environment as Nr then causes N pollution. It has been assessed repeatedly that the human alternation of the global N cycling has already transgressed the planetary boundaries (Rockstörm et al., 2009; Steffen et al., 2015; Richardson et al., 2023). The world-mean NUE of crop production is ca. 50% and that of livestock production ranges from 5% to 20% (Lassaletta et al., 2014; Bouwman et al., 2013). Preference for animal products, therefore, lowers the food system NUE, and food loss wastes all the N input to produce the lost food. Economic disparity of fertilizer availability results in regions with too much and too little N in the world (Schulte-Uebbing et al., 2022). Places of production and consumption often cross borders, causing that consuming countries contribute to the N pollution in producing countries (Oita et al., 2016). Global N waste has been increasing since 1961, approximately four times in 2005 and will be six times in 2050 compared to that in 1961 (Sutton et al., 2021). Agricultural N input in 2050 will increase to support future food demand that intensifies the surplus N in croplands (Mogollón et al., 2018). A new N use as fuel ammonia (NH₃) is being created (Nishina, 2022). In addition to watching future progress, our N use should shift to a more sustainable one to address the N issue.

Fig. 2. Benefits of nitrogen use and costs (damages) of nitrogen pollution in the world in 2010 (van Grinsven et al., 2025)

BASE, 2010; S7・S3・S1, scenarios in 2050 (best, intermediate, worst).

Total costs (C) and benefits (B) of global N use in the base year of 2010 and projected for 2050 under contrasting scenarios in real US$ for 2015 price levels, distinguishing effects of increase in flow and unit price. Also shown are the ratios of benefits over costs (BCR).

Based on the estimation by Hayashi et al. (2021), the annual N waste in Japan from 2000 to 2015 was ca. 6 Tg N yr–1, and its per capita value was approximately double of the world mean. More than 80% of the N waste in Japan originated from the imported commodities. Therefore, limited recycling opportunities are available within the nation, and the exporting countries suffer N pollution during the production of exports. N flow with fish products is also important in Japan because that accounts for ca. 20% of the food N supply. Although the NUE of fish products can be hundreds of percent owing to natural catch, the sustainability of fishery resources can be violated. The Nr lost to the environment has showed a decreasing trend in Japan, where the decrease in nitrogen oxides (NOX) from transportation sector was remarkable. Meanwhile, Japan focuses on NH₃ fuel in terms of decarbonization because combusted NH₃ does not create carbon dioxide. The Ministry of Economy, Trade and Industry (METI) announced a plan in September 2021 that 25 Tg N yr–1 of NH₃, corresponding to 18% of the world NH₃ production in 2015, will be supplied for fuels in Japan in 2050 (METI, 2021). The NH₃ supply will rely on imports due to cost efficiency. There are concerns of economic competition among N uses and of N pollution due to NOX emissions with NH₃ combustion and NH₃ leakage. The future N use in Japan is uncertain, and its change will spread to the world via international trade. It is expected that policy, technology, and behavior changes for sustainable N use in Japan will contribute to solving the world’s N issue.

The International Nitrogen Initiative (INI) is an expert group officially launched in 2003. INI tackles the N issue, plans international projects, supports international organizations, and hosts international N conferences on a 3-year basis (INI, 2025). PL Hayashi was appointed as the director of INI East Asia Centre in November 2022. PL is working to connect experts in East and Southeast Asia, link national and international activities, and prepare for the 10th International N Conference (N2026) in November 2026 in Kyoto (N2026, 2025). UNEP and INI worked on the International Nitrogen Management System (INMS) project (Oct. 2017–Jun. 2023) to apply scientific knowledge to international policies (INMS, 2024a). PL and several SusN members have contributed to INMS. Its final product, the International Nitrogen Assessment (INA), will be published in 2026 (Sutton et al., 2026). SusN can be considered a spin-off of INMS (INMS, 2024b). The United Nations Environment Assembly (UNEA) is held on a 2-year basis and its fourth and fifth sessions adopted the Resolution on Sustainable Nitrogen Management (UNEP, 2019b; 2022). Following the first resolution, UNEP established the Working Group on Nitrogen (WGN) in 2020 to discuss and form the framework of international N management (WGN, 2025). Japan has also been part of the WGN since 2022, with the Ministry of the Environment (MoE) as the national focal point and the Ministry of Agriculture, Forestry and Fisheries (MAFF). PL and SusN member Nishina have been helping them as experts since the 4th WGN. Unfortunately, a third N resolution was not tables at UNEA-7 in December 2025. In early 2024, RIHN joined the UNEP Global Partnership on Nutrient Management (GPNM), a multi-stakeholder group established in 2009 for sustainable nutrient use (GPNM, 2025) in January 2024 with PL as the contact person. Then, PL was appointed as a member of the GPNM Steering Committee in June 2024 for three years upon a recommendation of MoE. In September 2024, MoE developed the world's first national action plan (NAP) on sustainable N management (MoE, 2024). PL served as the chair of its working group, and two SusN members contributed to the action plan as working group members.

Research on the N issue has made progress on individual topics, e.g., elucidation and numerical modeling of environmental N cycling processes, environmental monitoring, impact assessment of each pollution, N footprint development as an indicator, agri-environmental policy analysis, and technology development for industrial applications. However, many interdisciplinary themes to address the N issue remain. Examples include responses and impacts of natural ecosystems to Nr loading, precise quantification of N flows in human society with pathways to the environment and their future scenarios, material and economic effects of policy, technology, and behavior change on the N issue, and the visualization of causal relationships between N use and N pollution to develop a framework to support decision-making. Furthermore, a transdisciplinary approach with various stakeholders to co-create sustainable N use is essential. This is because N is deeply connected to all human activities through the production and consumption of food, goods, and energy. Future Design (FD), a method of creating ideas as imaginary future persons, is expected to be used for co-creating ideas to address the N issue, for which SusN has been working with the RIHN FD Project (PL: Nakagawa).

2) How does the research contribute to the solution of the global environmental problems?

SusN aims to deepen research in each field on the N issue and to make the following three breakthroughs: (1) N-DPSIR, (2) N Recognition, and (3) Future N Design. (1) provides a tool for quantitative evaluation (e.g., cost-benefit analysis [CBA]) and visualization of how N use and N pollution are changed by policy, technology, and behavior change. (2) compiles up-to-date interdisciplinary knowledge (e.g., various specialized books), transdisciplinary knowledge (e.g., narratives on the N issue), and approaches to each stakeholder. (3) practices FD with various domestic and international stakeholders and gains experience working with international N management by UNEP. The outcome of SusN is to provide quantitative information on the effects of various measures and behavior changes based on the causal relationship between N use and N pollution, to promote diverse stakeholders to make the N issue their own through inter- and trans-disciplinary knowledge of the N issue, and then to generate ideas of the sustainable N use for future generation. As a result, we expect that awareness of the N issue will increase both domestically and internationally, existing and new efforts toward sustainable N use will be strengthened, and breakthroughs will be made toward resolving the N issue.

3) Methodology, structure and schedule

Many unknowns remain in the N issue. The first pillar of our research is to accumulate scientific knowledge covering natural science and social science and to promote interdisciplinary research (e.g., field research, laboratory experiments, numerical analysis, questionnaire surveys, data development, and scenario building). To take actions to address the N issue, a mechanism is needed to support policy making, to spread awareness of the N issue among different stakeholders, and to create ideas for sustainable N use. The second pillar is, therefore, transdisciplinary research to integrate existing and cutting-edge interdisciplinary knowledge and co-create breakthroughs with other stakeholders. The third pillar is to create positive synergies through close collaboration with N-related programs and projects in Japan and abroad, as there are limits to what SusN can accomplish on its own. Such collaboration will generate many spin-offs and increase the likelihood that a group of projects contributing to sustainable N use will continue after SusN ends.

SusN consists of three interdisciplinary research units (RUs): Natural Cycling Unit responsible for elucidating the unknowns of environmental N dynamics and providing information and data on the natural science aspects of N for analysis by other units, Human Society Unit responsible for calculating N flows associated with the production and consumption of food, goods, and energy, and the emissions of each N species to the environment and developing future scenarios for N use, and Economic Evaluation Unit responsible for measuring the social costs associated with human activities such as food production and consumption and clarifying behavioral changes and nudge effects related to N. SusN also has one transdisciplinary research unit; Future Design Unit to achieve three breakthroughs in collaboration with the other three units. In addition to establishing common analysis sites, the unit works on inter- and trans-disciplinary research from both bottom-up and top-down perspectives, linking local, national, regional, and global scales (Fig. 3).

Fig. 3. Schematic view of research approach. Three interdisciplinary research units (RUs; natural cycling, human society, and economic evaluation) deepen each research, and one transdisciplinary unit (Future Design) works to achieve the three breakthroughs, i.e., N-DPSIR analysis, N recognition, and future N challenge, in close collaboration with the other RUs. DPSIR, driver-pressure-state-impact-response; INMS, International Nitrogen Management System; UNEP, United Nations Environment Programme; and INI, International Nitrogen Initiative.

The research roadmap is shown in section 7. The common research sites are Tokyo Bay area and Lake Biwa, etc., and each unit may establish its own sites (e.g., Yosano Town, Miyakojima Island, and Minamata City). The four units work together to elucidate the actual state of the natural and social N cycle at each site and the DPSIR linkage (EEA, 1999; EEA, 2005; 9. Fig. 4), to elucidate the differences and similarities in the behavior of local stakeholders (e.g., producers and consumers) in each site with respect to the N issue, and conduct transdisciplinary research to spread awareness of the N issue and co-design future N use.

Fig. 4. Driver–Pressure–State–Impact–Response (DPSIR) framework applied to one aspect of the nitrogen issue, i.e,. atmospheric transportation, deposition, and exposure as an example.

4) Expected results

The following are expected: significant enhancement of interdisciplinary knowledge, (e.g., spatio-temporal relationship between water quality and N deposition in mountain streamwater nationwide, N flows in human society and Nr emissions to the environment, social costs of N pollution control measures, etc.), collaborative research results in natural and social sciences (e.g., social experiments supported by natural sciences, N footprint and other indicators for economic evaluation and behavior change, an N-DPSIR visualization tool, etc.), various narratives based on inter- and trans-disciplinary knowledge (e.g. brochures and videos on the N issue [already produced], awareness of the N issue through various outreach activities, specialized books, Japanese Nitrogen Assessment [JaNA] as the final product, etc.), and ideas contributing to sustainable N use derived from FD practices with domestic and international stakeholders. Important achievements include contributions to N management by UNEP and that in Japan, publication of INA in mid-FR3 (PL is an editor), and hosting the 10th International N Conference in Kyoto in mid-FR4 (Fig. 5).

Fig. 5. Expected outputs and outcomes of the Sustai-N-able Project.

5) Project organization and membership

SusN consists of three RUs in charge of interdisciplinary research (Natural Cycling, Human Society, and Economic Evaluation) and one RU in charge of transdisciplinary research (Future Design). The three interdisciplinary RUs strive to deepen research in their respective fields of study, while also conducting collaborative research at the common research sites to accumulate cross-disciplinary knowledge on the N issue. Future Design Unit collaborates with the other RUs to co-create inter- and trans-disciplinary knowledge with other stakeholders. Future Design Unit sets up several missions, e.g., activities on N recognition, forming respective teams from interested members from all RUs. Each unit has a unit leader. Sub-unit leaders may be appointed by decision of the unit leader. Since Future Design Unit is responsible for the integrated task of co-creating transdisciplinary knowledge, PL also takes on the role of leader of this unit. The composition of leaders and members (as of 9 January 2026) is shown in Fig. 6.

Fig. 6. Research units and members of Sustai-N-able Project (as of 9 January 2026).
　
Challenges and achievements for this year
2. Project progress during the FR period to date

1) Project overall progress

Results including methodological development and project organization formed

To create actions to address the N issue, support for decision-making such as policies, awareness rising of the N issue, and a mechanism to generate free ideas to realize sustainable N use for future generations are required. They will be achieved by the three SusN breakthroughs, (1) N-DPSIR, (2) N Recognition, and (3) Future N Design. While the Natural Cycling, Human Society, and Economic Evaluation Units conduct interdisciplinary research, several missions are set that would lead to transdisciplinary research by the Future Design Unit to achieved the three breakthroughs, and a team is formed for each mission with participants from all units, e.g., cost-benefit analysis (CBA), analysis in the Tokyo Bay area, and FD practices with various stakeholders. After having selected Tokyo Bay, Lake Biwa, Matsushima Bay, and Lake Kasumigaura as common study sites, activities in FR3 are converging on Tokyo Bay and Lake Biwa as our main targets. Meanwhile, activities in Miyakojima Island, Yosano Town, and Minamata City and the Shiranui Sea area are gaining momentum as local stakeholder collaborations. Following the Japan’s NAP (MoE, 2024), municipal-level initiatives have been launched, for which SusN is providing support. To raise international awareness of oligotrophication, an English opinion paper was published (Fig. 7; Hayashi et al., 2025a). SusN has collaborated with other programs and projects such as JST COI-NEXT Gastronomy Geopolitics (PL: Matsubae, Human Society Unit leader), Environment Research and Technology Development Fund JpNwst (PL: Nishina, Natural Cycling Unit member), NEDO Moonshot N Cycling (PL: Kawamoto, AIST), life cycle impact assessment (LCIA) LIME (Itsubo, Waseda University), INI, and UNEP as well as activities in RIHN. Our highest priority is to foster human connections among diverse inter- and trans-disciplinary fields. The four SusN RUs have been strengthened with the participation of leading researchers in the fields of biogeochemistry, isotopic chemistry, environmental engineering, industrial ecology, agronomy, agricultural economics, environmental economics, and life history, as well as experts in unique activities from inter- and trans-disciplinary aspects of agriculture, food culture, cooking, environmental education, and media. SusN has hired RIHN researchers who are expected to be future leaders in research and actions that contribute to addressing the N issue, and research associates to support our various activities.

Fig. 7. Oligotrophication trends of enclosed seas in Japan (Hayashi et al., 2025)

In FS, SusN published Japanese N budgets (Hayashi et al., 2021a), held many symposia and workshops, and published “Picture Book of Nitrogen and the Environment” (Hayashi et al., 2021b). In PR, SusN published many reviews, books, and articles on the N issue and PL was selected as a member of INI, the first case from Japan. In FR1, SusN supported the “Mountain Health Checkup”, a nationwide mountain streamwater survey using a citizen science method (Kyoto University, 2022). This was a precursor to the survey that SusN originally planned to conduct in FR1 and a follow-up to the 2003 nationwide survey by the RIHN Environmental Valuation Project. Activities with the RIHN FD Project, workshops on interpreting the N issue through systems thinking and creating strategies to spread awareness of the N issue (Hayashi et al., 2025b), and activities in Miyakojima Island and Yosano Town were also implemented. From the end of FS to early PR, study meetings on the N issue were held for MAFF, MoE, METI, and Ministry of Land, Infrastructure, Transport and Tourism (MLIT), and after several inquiries from MoE, N management was identified as an administrative need for the FY2023 Environment Research and Technology Development Fund, and the proposed project was adopted as JpNwst (PL: Nishina). JpNwst contributes to the realization of breakthroughs (1) and (3) through the development of Japanese N inventory and the evaluation of reduction potential of N waste. In FR2, several books and papers were published (Makino et al., 2024; Shigetomi et al., 2024; Kuriyama, 2024; 2025). The JaNA editorial board was formed to prepare its writing guidance and draft contents. We held a Chronological Table of Meals workshop in Miyakojima City and committed to the Smart Green Village Establishment Council of Yosano Town. The exhibition “Ghost Story and Nitrogen” in collaboration with art and design was a success (Loftwork, 2024). We developed an FD experience package and put into practice at the 22nd International N Workshop (Aarhus, Denmark). A symposium with speakers from MoE and MAFF was organized at the 2024 Annual Meeting of Japanese Society of Soil Science and Plant Nutrition. SusN contributed to formulating the Japan’s NAP (MoE, 2024). Internationally, SusN has contributed to the WGN and GPNM and successfully secured the hosting N2026 in Kyoto. Detailed information is given in Section 3. 1).

Level of achievement in the whole research plan

Breakthrough 1 N-DPSIR: A pathway of simplified CBA was established. Progress had previously been constrained by delays in the publication of INA; however, a co-authored CBA paper was published in the summer of FR3 (Fig. 2, van Grinsven et al., 2025). By combining the derived unit damage costs with Japanese N budgets (e.g., Hayashi et al., 2021a), simplified CBA becomes feasible. Methodological improvements and an extension of Japanese N budgets to 1990–2023 have been achieved through collaboration with the JpNwst project. All INA chapters have now been completed, and publication information is expected to be released shortly by Cambridge University Press.

Breakthrough 2 N Recognition: Outreach activities expanded substantially, leading to increased external requests. A strategy for enhancing societal recognition of the N issue was established, including collaboration with art and design. Public events and symposia in FS, PR, and FR1 attracted several hundred participants across multiple phases. Key outreach outputs included publications, bilingual illustrated materials, a short introductory video (Hayashi et al., 2021b; SusN, 2023; Hayashi & Abe, 2023; RIHN & Loftwork, 2024), and the establishment of the editorial committee for JaNA, the final SusN deliverable. In FR3, interactive tools such as the “Feelings of Nitrogen” Game and Nitrogen Quiz Cards were developed, proving particularly effective for outreach to school-aged audiences.

Breakthrough 3 Future N Design: Direct contributions to N management were achieved at both national and international levels. Domestically, we supported the formulation of Japan’s NAP (MoE, 2024) and subsequent municipal initiatives. Internationally, activities were supported through roles within INI, GPNM, and WGN. Research on FD progressed, with outcomes published (Nakagawa et al., 2025a; 2025b), and FD-based deliberation was implemented at international conferences, including applications to technology assessment (Nakagawa et al., 2025c). In addition, we successfully secured the hosting of N2026 in Kyoto in November 2026 (N2026, 2025).

Outcomes beyond expectation

The election of the PL as the INI East Asia Director (from November 2022) is the result of a review process, and is self-evaluated as a recognition of the efforts of SusN and PL. The press release of the Japanese N budgets in FS (Hayashi et al., 2021a) generated inquiries from government agencies, and through study meetings and discussions with relevant ministries in PR and FR1, SusN was able to assist MoE in the formulation of Japan’s NAP (MoE, 2024). Based on the recommendation by MoE, PL was selected as a member of the GPNM Steering Committee. Although these were ambitious goals for SusN, they were achieved at a scale and pace that exceeded initial expectations. N2026, to be held in Kyoto in November 2026 and chaired by PL as Organizing Committee Chair, will represent an important opportunity at the first International Nitrogen Conference to be hosted in Japan.

Challenges encountered and their possible solutions

Due to the COVID-19 pandemic, publication of INA, the final delivery of the INMS project, has been significantly delayed and remains unpublished. The CBA framework to be included in INA constitutes important reference information for SusN Breakthrough 1; however, the CBA component was published in advance as a co-authored paper (van Grinsven et al., 2025). In parallel, the BRIDGE project led by Itusbo (Waseda University), a life cycle assessment (LCA) researcher, was launched in FR2, in which PL is also involved, with the explicit aim of integrating CBA and LCA methodologies.

2) Amendments to research objectives, methodology and organization as applicable

There have been no changes to the research objectives, methodologies, or organizational structure. At the conclusion of the PR phase, the Sub-Leader and Co-Head of the Future Design Unit stepped down; however, the project has proceeded without appointing a new Sub-Leader. The Natural Cycling Unit and the Human Society Unit have each appointed Deputy Heads within their respective units.

3. Self-diagnosis of research results in this year

1) Results achieved this year

Research results from the previous EREC review.

Breakthrough 1 N-DPSIR: Several key publications were produced, including: evaluation of the feasibility of a 30% reduction in fertilizer application based on a meta-analysis (Nishina et al., 2025); strategies for enhancing societal recognition of the N issue using systems thinking (Fig. 8; Hayashi et al., 2025b); FD applications to visioning future NH₃ use and rice consumption (Fig. 9; Nakagawa et al., 2025a; 2025b); the potential for agricultural recycling of food waste using the Keihoku region as a model case (Jung et al., 2025); a global-scale assessment of the benefits and the damage costs of N use for 2010 and 2050 (van Grinsven et al., 2025); an English-language book based on The Economics of Sustainable Agriculture (Kuriyama, 2024; 2025); two INMS guidance documents focusing on N budgets and impact assessment (Winiwarter et al., 2025; Shibata et al., 2025); and the response of N cycling in glacier-foreland soils in Svalbard to passive warming experiments (Hayashi et al., 2025c). Several other papers are currently under preparation or peer review, and preparations for additional publications are underway (e.g., Sutton et al., 2026; Hayashi, 2026a; 2026b). Activities within each research unit have progressed as planned. In terms of inter-unit collaboration, an opinion paper on oligotrophication in enclosed coastal seas (Hayashi et al., 2025a) and a research paper based on surveys in Matsushima Bay have been published (Jiang et al., 2025). Field surveys and preparations for a festival in Miyakojima City have also been advanced. Regarding project collaborations, substantial progress was achieved in a project aimed at extending Japanese N inventory and assessing reduction potential of N waste (JpNwst; PL: Nishina), including the revision of Japanese N budgets and its extension to cover 1990–2023. In a technology development project focused on the direct recovery of reactive N from exhaust gas and wastewater (MSN; PL: Kawamoto), contributions are made by SusN PL as an external evaluation committee member, serving as a bridge to future collaboration on N management. In the LCA project initiated in FR2 (SIP-BRIDGE; PL: Itsubo), work progressed on the estimation of damage factors for eutrophication.

Fig. 8. Stakeholder relationships and theory of changes towards awareness rising on the nitrogen issue in the Japanese food industry and diet (Hayashi et al., 2025b) [in Japanese with English abstract]

Fig. 9. Procedures for Future Design by scientists applied to the future design for ammonia use (Nakagawa et al., 2025a)

Breakthrough 2 N Recognition: Approximately 3,000 copies of SusN leaflets (Japanese and English versions) have been distributed since FR1, and a short video with Japanese and English subtitles produced has been used in various outreach activities. In collaboration with the RHIN Education Division and Public Relations Unit, the “Feelings of Nitrogen” Game was developed for children, enabling players to learn about their deep connections with N by role-playing N while moving through natural and social systems. The game was used in the Future Scientist Training Program (Kyoto Municipal Science Center for Youth) and was well received by elementary and junior high school students. Although applications to MEXT’s “One Poster per Household” initiative advanced to the interview stage three times, they were not selected; the poster will instead be finalized independently in FR4. Major events co-organized by SusN included a regional issues workshop in Miyakojima City and Terramadre Japan 2025 in Minamata. Planning is also underway for Sustai-N-able Island Day 2026 in Miyakojima City. These activities have strengthened human networks with local groups working toward sustainable food and environment. PL has also been engaged in numerous lectures and talks, observing a gradual increase in awareness of the N issue. Lead authors for each chapter of JaNA, the final SusN deliverable, were appointed, an expanded editorial meeting was held, author guidelines were finalized, and writing has begun.

Breakthrough 3 Future N Design: FD was applied in combination with technology assessment through sessions involving both experts and citizens. To gain perspectives for future scenario building, work began on the “Worldviews of Nitrogen” survey, including the formation of a research team and the development of questionnaire items, with a pilot survey being finished by the end of FR3. In domestic policy support, SusN contributed in FR3 as advisors and committee members to related MoE initiatives, and PL and some SusN members participated in discussions on agricultural futures in Yosano Town. PL was also appointed to a national committee on nitrate pollution control for groundwater protection and provided an overview of the N issue to representatives from 230 municipalities at the first national information-sharing meeting in October 2025. Internationally, PL has been involved in the INI Steering Committee member and the GPNM Steering Committee. At the request of MoE, the PL and Nishina (SusN member) participated in the 7th WGN meeting in July 2025 and UNEA-7 in December 2025.

Across all breakthroughs, organizational arrangements for N2026—including the Secretariat, Organizing Committee, and Advisory Committee—were established under the leadership of the PL as Organizing Committee Chair. Program structures and session lists have been developed, and preparations are underway for N2026 including a public symposium and the RIHN International Symposium for FY2026.

What part of the project final outcome has been achieved

Breakthrough 1: Following the publication of a co-authored CBA paper, a framework has been established to conduct a Japan-specific CBA by combining the emission-based unit damage costs with Japanese N budgets extended through the JpNwst project. In parallel, within the LCA project, progress has been made toward estimating damage factors for eutrophication in terms of plant extinction risk. In FR4, damage assessment linked to the LCA methodology will be conducted and compared with the CBA results.

Breakthrough 2: Through extensive outreach, awareness of the N issue has steadily increased across a widening range of audiences, including citizens, schoolchildren, university students, producers, local governments, policymakers, and researchers from other disciplines. The chapter structure and corresponding lead authors for each chapter of JaNA, the final SusN deliverable, have been finalized and writing has begun.

Breakthrough 3: Direct contributions to domestic and international N management were achieved in FR2. In FR3, follow-up activities were expanded, including outreach to municipal agriculture and environmental divisions in Japan. N2026, themed “Sustainable Nitrogen Management for Future Generations,” is planned to culminate in the adoption of the Kyoto Declaration, which will incorporate our shared vision for future N use and management.

2) Results can be evaluated as having overfulfilled

A key achievement is that direct engagement in domestic and international N management was realized as early as FR2. SusN contributed to Japan’s NAP, the world’s first of its kind, and provided expert input to UNEP-led international N management, both directly and indirectly in support of Japan. PL serves on the INI and GPNM Steering Committees and has participated in WGN and UNEA at the request of MoE, while maintaining independence as a researcher. SusN also successfully secured the hosting of N2026 in Japan, selected as a jointly organized international conference of the Science Council of Japan (tentative). Held in conjunction with the RIHN International Symposium including a public symposium, N2026 will be an important opportunity to advance SusN’s objectives and enhance RIHN’s presence.

3) Points to be evaluated that the goals were not reached

For Breakthrough 1, progress in establishing a CBA framework has been slower than planned, mainly due to further delays in the publication of INA, which was intended as a key global reference. In response, the CBA methodology and core results of INA were published in advance as a peer-reviewed paper in August of FR3 (van Grinsven et al., 2025). By combining the unit benefit and damage factors from this paper with Japanese N budgets extended to 1990–2023 through the JpNwst project, a pathway toward a simplified nitrogen CBA for Japan has been established, and quantitative analyses are underway within FR3. In parallel, the BRIDGE project launched in FR2 is expected to derive eutrophication damage factors within FR3. Comparative evaluation of CBA and LCA results is planned for FR4, contributing to the design of causal analysis tools. While tool development remains challenging, FR5 will consolidate the achieved research outcomes and provide a foundation for subsequent work.

4) Notable achievements and challenges as to contribution to the RIHN programs

The three breakthroughs of SusN correspond to the three goals of the program “Co-creation of the Earth-human System Program”: elucidating linkages between diverse human activities and nature to reduce trade-offs and enhance synergies, developing effective communication approaches, and transforming human–nature relationships for a sustainable future. Furthermore, the “Worldviews of Nitrogen” survey initiated in FR3 involves Taniguchi PD and is designed with potential interaction and cooperation with the “Worldviews of Water” survey being conducted under the RIHN LINKAGE project.

　
Future tasks
5. Research plan for next year

Plans for each research unit in FR4 and toward achieving the three breakthroughs are as follows.

Natural Cycling Unit:

1, Assess the impacts of wastewater treatment plants on riverine and coastal water quality at both regional and process levels; 2, Analyze national patterns of watershed-scale N dynamics by integrating atmospheric, mountainous, riverine, and coastal water quality data, and visualize results using GIS; 3, Evaluate N deposition vulnerability of forested catchments nationwide using historical and current mountain stream datasets combined with machine learning; and 4, Analyze N cycling in the Tokyo Bay and Lake Biwa, and support choice experiments conducted by the Economic Evaluation Unit.

Human Society Unit:

1, Refine N footprint analysis based on extended input–output tables, incorporation of N emissions associated with resource and energy use in food systems, and revision of region-specific virtual N factors; and 2, Develop scenario analyses of future N use applicable to CBA, such as improvements in agricultural NUE, utilization of waste and unused resources, and trade-offs between low-carbon technologies and increased N waste.

Economic Evaluation Unit:

1, Analyze agri-environmental policies and plant-based food choices; 2, Analyze consumer preferences for plant-based meat; 3, Conduct choice experiments on willingness to pay for water quality improvement in Tokyo Bay; and 4, Analyze producers’ choices regarding environmentally friendly practices.

Future Design Unit:

1, Establish a basic CBA framework by combining international unit values from INA with the expanded Japanese N budgets, estimate scenario-based changes in N flows, and improve the framework through comparison with LCA-based evaluations; 2, Synthesize and publish results of the “Worldviews of Nitrogen” survey; 3, Actively promote outreach through lectures, talks, and public events, with particular emphasis on the National Museum of Nature and Science–RIHN joint exhibition; 4, Engage in knowledge sharing and co-creation with local stakeholders in Miyakojima City, Yosano Town, and the Minamata–Shiranui Sea region; and 5, Contribute to domestic (e.g., MoE, MAFF) and international (e.g., UNEP, INI) Ns management and strengthen related networks.

All units, in collaboration with external partners, will continue work on JaNA. N2026 will be held together with the RIHN International Symposium and a public symposium, serving as a platform to disseminate SusN outcomes and to formulate the Kyoto Declaration on Sustainable Nitrogen Management for Future Generations.

6. Tasks for the next fiscal year onward

1. The problems and challenges that the project faced this year and their possible solutions.

Following advice from Taniguchi PD at the end of FR2 to strengthen the cultural approach, we have focused on exploring diverse perspectives on culture beyond food studies in FR3. A dedicated team was formed to develop the “Worldviews of Nitrogen” survey, and a pilot survey is currently underway. In parallel, collaboration was established with forward-looking local groups in Minamata and surrounding areas, culminating in the co-organization of Terramadre Japan 2025 in Minamata in FR3, with participation from local authorities and multiple stakeholders. Internal coordination has been strengthened through close information sharing between PL and unit heads, with the PL supporting activities as needed to promote collaboration. While the absence of a sub-leader has not caused operational issues, contingency planning is recognized as necessary.

2. Particular issues regarding the RIHN support system for project research

Continued institutional support for outreach activities is requested. In FR3, collaboration among the Education Division, Public Relations Unit, and SusN enabled a children’s program and the development of the “Feelings of Nitrogen” game. In FR4, N2026 will be held including the RIHN International Symposium and a public symposium supported by the Public Relations Unit and cooperation from other centers and projects, positioning RIHN as a co-host institution. Institutional support is requested to ensure smooth and mutually beneficial implementation. JaNA, the final SusN deliverables (Japanese and English editions) are planned for publication in the RIHN book series; production of the Japanese edition has begun with approval from Kyoto University Press, and discussions with Springer-Nature will proceed for the English edition. We request RIHN’s support for these publications.

Project Members

Leader, HAYASHI Kentaro, Research Institute for Humanity and Nature, Professor

Core member, KOBA Keisuke, Center for Ecological Research, Kyoto University, Director/Professor, Natural science of N

Core member, MATSUBAE Kazuyo, Graduate School of Environmental Studies , Tohoku University, Professor

Core member, KURIYAMA Koichi, Graduate School of Agriculture, Kyoto University, Professor, economic analysis

ASANO Maki, Faculty of Life and Environmental Sciences, University of Tsukuba, Assistant Professor

ASARI Misuzu, Research Institute for Humanity and Nature, Professor

ARAI Hirotsugu, Program Research Department, Research Institute for Humanity and Nature, Researcher

INOUE Yukako, Department of Social Psychology, Yasuda Women's University, Lecturer

UMEZAWA Yu, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Professor

OITA Azusa, Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Senior Scientist

Otsu Eri, Research Institute for Humanity and Nature, Visiting Associate Professor

OKAGAWA Azusa, Social Systems Division, National Institute for Environmental Studies, Senior Researcher

OSAKA Ken'ichi, Faculty of Environmental Science, The University of Shiga Prefecture, Associate Professor

OYAMA Shinji, Shoshi Azusa, Representative

KAMEOKA Takaharu, Center for Social Systems, Shinshu University, Specially Appointed Professor

KYOI Shinsuke, Faculty of Humanities and Social Sciences, Yamagata University, Lecturer

KOYANAGI Tomoyo, FSIFEE, Tokyo Gakugei University, Associate Professor

SASAKI Hiroki, School of Agriculture , Meiji University, Associate Professor

SHIGETOMI Yosuke, College of Science and Engineering, Ritsumeikan University, Associate Professor

JUNG Wanseop, Graduate School of Engineering, Kyoto University, PhD student

JIANG Mengqi, Center for Ecological Research, Kyoto University, Postdoctoral Fellowships for Research in Japan

SHINJO Hitoshi, Graduate School of Global Environmental Studies, Kyoto University, Professor

TATENO Ryunosuke, Field Science Education and Research Center, Kyoto University, Professor

TIKU Oscar, Faculty of Transdisciplinary Sciences for Innovation, Kanazawa University, Lecturer

ZHANG Zhengyang , Graduate School of Environmental Studies , Tohoku University, Assistant Professor

NAGASAWA Mitsuko, Science, Medical and Lifestyle News Section, THE ASAHI SHIMBUN, Staff writer

NISHINA Kazuya, Earth System Division, National Insitute for Environmental Studies, Senior Researcher

BITO Tamaki, Educational Business Department, Tsuji Culinary Research Co.,Ltd. , Department Manager

HIRONO Yuhei, Institute of Fruit Tree and Tea Sciences, National Agriculture and Food Research Organization, Deputy Leader

FUJIWARA Taku, Garduate School of Global Environmental Studies, Kyoto University, Professor

WATANABE Eiyu, Agricultural Science, University of Tsukuba, Student

WATANUKI Junko, 57th Japanese Antarctic Research Expedition, Kitchen staff

KABAYA Kei, Faculty of Economics, Chuo University, Associate Professor

YAMASUE Eiji, Faculty of Science and Engineering, Ritsumeikan University, Professor

SHIBATA Rei, Faculty of Agriculture, Niigata University, Assistant Professor

MURAKAMI Kayo, School of Economics, Kwansei Gakuin University, Associate Professor

NAKAGAWA Yoshinori, Graduate School of Global Environmental Studies, Sophia University, Professor

KASHIWAKURA Shunsuke, Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Research Associate Professor

KOSAI Shoki, College of Gastronomy Management, Ritsumeikan University, Associate Professor

ONODERA Takashi, Regional Environment Conservation Division,Environment Management and Technology Section, National Institute for Environmental Studies, Chief Senior Researcher

TOKUCHI Naoko, Field Science Education and Research Center, Kyoto University, Professor

SAIKI Makoto, Program Research Department, Research Institute for Humanity and Nature, Researcher

KATO Kota, National Agriculture and Food Research Organization, Researcher

MINAKI Kanako, Graduate School of Asian and African Area Atudies, Kyoto University, Graduate Student

MAKINO Soyoka, Department of Bioscience and Biotechnology, Fukui Prefectural University, Assistant Professor

KIMURA Ayako, Program Research Department, Research Institute for Humanity and Nature, Research Associate

SASAKI Noriko, Program Research Department, Research Institute for Humanity and Nature, Research Associate

Research Achievement

Books etc

Single work / Joint work

Shibata H.; Baron JS; Leach A.; Liptzin D.; Oita A.; Weinmann T.; Adhya T.; Allen I.; Alonso R.; Artioli Y.; Baisden T.; Bealey B.; Bermejo V.; Bruggeman J.; Bruulsema T.; Burkhardt J.; Clark C.; Compton J.; Dalgaard T.; de Vries W.; Dukes E.; Eguchi S.; Erisman JW; Galloway J.; Giweta MH; González-Fernández I.; van Grinsven H.; Groffman P.; Gu B.; Hall S.; Hayashi K.; Hobbie E.; Holt J.; Jones L.; Katagiri K.; Lassaletta L.; Liang X.; Lilleskov E.; Masso C.; Matsubae K.; Quemada M.; Riaz M.; Schichtel B.; Shindo J.; Su M-C.; Templer P.; Tidblad J.; Zheng A., Oct. 2025, Joint work, Guidance Document on Nitrogen Impact Assessment Methods, INMS Guidance Document Series (Series Editors: Sutton MA, Schlegel M, Baron J, van Grinsven HJM). INMS Report 2025/02, UK Centre for Ecology & Hydrology, Edinburgh, UK, ISBN: 9781906698867

Kuriyama K.; Hayashi K.; Sasaki H.; Murakami K.; Kabaya K.; Kyoi S., 25 Mar. 2025, Chapters 1 and 8, Joint work, Economics of Sustainable Agriculture, Springer-Nature, English, Scholarly book, ISBN: 9789819635023
DOI

Brownlie WJ; Aziz T; Sutton MA; Shenk A; Winkler MH; Robinson G; Adhya T; Amon B; Awan MI; Bittman S; Bleeker A; Borghardt G; Butterbach-Bahl K; Brandani S; Constantinescu M; Dahl, KR; Dalgaard T; Delon C; Döhler H; Galy-Lacaux C; Garnier J; Groensestein K; Hailemariam M; Hayashi K; Hiller J; Jensen LS; Kawamoto T; Kozlova N; Lukin S; Lund T; Marques-dos-Santos C; Maqsood M; Mathenge C; Medinets S; Minamisawa K; Misselbrook T; Nishina K; Oenema O; Pacheco F; Parajuli D; Rahman M; Rees RR; Sanz-Cobeña A; Shiraz H; Takahashi A; Tanaka H; Uchida Y; Wakeel A; Winiwarter W; Yan X, 25 Sep. 2024, Joint work, Nitrogen Mitigation. INMS Guidance Document on Measures for Sustainable Nitrogen Management, International Nitrogen Management System, UK Centre for Ecology and Hydrology, ISBN: 9781906698904

林健太郎, Jul. 2024, 第9章肥料と環境3. 窒素と多様な環境影響, Joint work, 植物栄養学第3版, 馬・信濃・高野編，文永堂出版

林健太郎, 31 Mar. 2024, 第1章持続的農業と窒素問題（栗山と共著），第8章農業を含む持続可能な窒素利用の実現に向けて, Joint work, 持続的農業の経済学－サステナブルな窒素利用の実現, 中央経済社, ISBN: 9784502496912

林健太郎, Feb. 2023, 第9章持続可能な窒素利用と地球環境SDGsネクサス, Joint work, SDGs達成に向けたネクサスアプローチ ―地球環境問題の解決のために―, 共立出版, ISBN: 9784320006133

Contributor

Shinsuke Kyoi, Mar. 2025, Chapter 6, Contributor, Certified vs. Non-certified Eco-Labels: Consumer Preferences for Eco-Labeled Agricultural Products, Springer Nature, ISBN: 9789819635023

Hiroki SASAKI, Mar. 2025, Contributor, Sustainable Agriculture and Agricultural Environmental Policy. In: Kuriyama, K. (eds) Economics of Sustainable Agriculture. Global Environmental Studies., Springer, Singapore. https://doi.org/10.1007/978-981-96-3502-3_3

Hiroki SASAKI, Mar. 2025, Contributor, Sasaki, H. (2025). Sustainable Agriculture and Behavioral Change. In: Kuriyama, K. (eds) Economics of Sustainable Agriculture. Global Environmental Studies., Springer, Singapore. https://doi.org/10.1007/978-981-96-3502-3_7, ISBN: 9789819635023

林健太郎, 10 Jun. 2024, エッセイ① 人類の窒素の獲得が生んだ環境問題，エッセイ② 地球の宝～南北両極地～をゆく, Contributor, 環境学入門―法学・経済学・自然科学から学ぶ, 慶應義塾大学出版会, ISBN: 9784766429572

栗山, 浩一, 02 Apr. 2024, Contributor, 持続的農業の経済学 : サステナブルな窒素利用の実現, ii, v, 213p, 中央経済グループパブリッシング, Japanese, ISBN: 9784502496912

栗山浩一, 02 Apr. 2024, 第4章消費者の多様性と農業環境政策, Contributor, 持続的農業の経済学: サステナブルな窒素利用の実現, 232, 中央経済グループパブリッシング, ISBN: 450249691X

2024, 99-119, Contributor, 持続的農業の経済学―サステナブルな窒素利用の実現, 中央経済社, ISBN: 9784502496912

Editor / Joint editor

Winiwarter W.; Hayashi K.; Geupel M.; Gu B.; Zhang X., Oct. 2025, Joint editor, Guidance Document on National Nitrogen Budgets, INMS Guidance Document Series (Series Editors: Sutton MA, Schlegel M, Baron J, van Grinsven HJM). INMS Report 2025/01, UK Centre for Ecology & Hydrology, Edinburgh, UK, ISBN: 9781906698874

栗山浩一, 02 Apr. 2024, Editor, 持続的農業の経済学: サステナブルな窒素利用の実現, 232, 中央経済グループパブリッシング, ISBN: 450249691X

林, 健太郎; 柴田, 英昭; 梅澤, 有, Dec. 2021, Joint editor, 図説窒素と環境の科学 : 人と自然のつながりと持続可能な窒素利用, vi, 181p, 朝倉書店, Japanese, General book, ISBN: 9784254180572

Supervisor

英国王立園芸協会(監修); ウェンジア・タン(イラスト); ジャクリーン・ストラウド(著); マーク・レッドマイル=ゴードン(著); 林健太郎(監訳); 北川玲(訳), 15 May 2024, 監訳，日本語解説, Supervisor, 奇妙で不思議な土の世界, 創元社, ISBN: 9784422430539

新学社ポピー, Apr. 2024, 小学ポピーPIKARI!! 2024年4月号 5年の特集, Supervisor, 探ろう！知ろう！窒素って、なんだろう？, 新学社

Published Papers

Kentaro Hayashi; Keisuke Ono; Yukiko Tanabe; Masahito Hayatsu; Kanako Tago; Tsubasa Ohbayashi; Yong Wang; Luciano Nobuhiro Aoyagi; Masaki Uchida, Nov. 2025, Ammonia Oxidation Property of Soils on the Glacier Foreland of Austre Brøggerbreen, Svalbard: Response to Open-top Chamber Experiments, Microbes and Environments, 40 (4), n/a-n/a, Japanese Society of Microbial Ecology, English, Refereed, Scientific journal
DOI

Hans J M van Grinsven; Baojing Gu; Alfredo Rodríguez; Laurence Jones; Roy Brouwer; Lena Schulte-Uebbing; Felipe S Pacheco; Luis Lassaletta; Kentaro Hayashi; Jan van Dam; Nandula Raghuram; Markus Geupel; Peter Ebanyat; Xiuming Zhang; Steven Lord; Sander de Bruyn; Mark A Sutton, 01 Sep. 2025, Valuing damages and benefits of the altered global nitrogen cycle; lessons for national to global policy support, Environmental Research Letters, 20, 094014, English, Refereed, Scientific journal
DOI

Yoshinori Nakagawa; Kentaro Hayashi; Kazuyo Matsubae; Kazuya Nishina; Bin-Le Lin; Tatsuyoshi Saijo, 20 Jun. 2025, The Future of Ammonia Use in 30 Years: A Deliberative Experimental Study Envisioning the Perspective of a Future Generation, Global Sustainability, 8, e26, Cambridge University Press (CUP), English, Refereed, Scientific journal
DOI

Wanseop Jung; Yasuhiro Hirai; Junya Yano; Taku Fujiwara; Misuzu Asari; Kentaro Hayashi, Jun. 2025, A local food resource circulation model combining anaerobic digestion and rice cultivation in Japan: impacts on climate change and nutrient use, Journal of Material Cycles and Waste Management, English, Refereed, Scientific journal
DOI

Kentaro Hayashi; Hirotsugu Arai; Yu Umezawa; Takashi Onodera; Kazuyo Matsubae; Keisuke Koba, 20 May 2025, Prevention Is the Best Strategy to Solve Coastal Eutrophication., Environmental science & technology, 59 (19), 9366-9368, English, Scientific journal
DOI

林健太郎; 棚橋弘季; 浦野奈美; 岡田小枝子; 菊竹栄杜; 京井尋佑; 後閑裕太朗; 齋木真琴; 柴田幸子; 竹腰麻由; 田根佐和子; 三輪彩紀子; 山田富久美, 05 Apr. 2025, 窒素問題へのシステム思考の超学際的応用―問題の自分事化の促進および食料システムにおける変化の理論の探索―, 日本土壌肥料学雑誌, 96 (2), 136-148, Japanese, Refereed, Scientific journal

林健太郎; 棚橋弘季; 浦野奈美; 岡田小枝子; 菊竹栄杜; 京井尋佑; 後閑裕太朗; 齋木真琴; 柴田幸子; 竹腰麻由; 田根佐和子; 三輪彩紀子; 山田富久美, Apr. 2025, 窒素問題へのシステム思考の超学際的応用—問題の自分事化の促進および食料システムにおける変化の理論の探索—, 日本土壌肥料学雑誌, 96 (2), 136-148
DOI

Kayo Murakami, 28 Mar. 2025, Consumer Heterogeneity and Agricultural Environmental Policy, In: Kuriyama, K. (eds) Economics of Sustainable Agriculture. Global Environmental Studies. Springer, Singapore., 67-88, Springer Singapore
DOI

Yoshinori Nakagawa; Kentaro Hayashi; Takaharu Kameoka; Hiroki Sasaki; Koichi Kuriyama; Masako Ichihara; Makoto Saiki; Tatsuyoshi Saijo, 07 Feb. 2025, Consumers’ Values and Preferences for Long-Term Policies in Multifaceted Rice Production and Consumption: A Deliberative Experiment Incorporating the Perspective of Future Generations in 2050, Global Sustainability, 1-39, Cambridge University Press (CUP), Refereed, Scientific journal
DOI

Kazuya Nishina; Kentaro Hayashi; Azusa Oita; Kei Asada; Atsushi Hayakawa; Tomohiro Okadera; Takashi Onodera; Tatsuya Hanaoka; Kazuaki Tsuchiya; Koya Kobayashi; Nobuhisa Koga, Jan. 2025, Feasibility assessment of Japan’s fertilizer reduction target: A meta-analysis and its implications for nitrogen waste, Journal of Environmental Management, 373, 123362, English, Refereed, Scientific journal
DOI

Yosuke Shigetomi; Asuka Ishigami; Yin Long; Andrew Chapman, 21 Oct. 2024, Curbing household food waste and associated climate change impacts in an ageing society, Nature Communications, 15, 8806, English, Refereed, Scientific journal
DOI

Shinsuke Kyoi; Koichiro Mori, Jun. 2024, Development of policy measures for diffusing human pro-environmental behavior in social networks—Computer simulation of a dynamic model of mutual learning, World Development Sustainability, 4, 100118-100118, Elsevier BV, Refereed, Scientific journal
DOI

Soyoka Makino; Naoko Tokuchi; Daisuke Akaishi; Lina A. Koyama; Yukio Komai; Yoshimi Itaya; Nay Lin Maung; Kanae Ishimaru; Tomoki Oda; Rei Shibata; Shinya Numamoto, 22 Apr. 2024, Citizen‐participatory nationwide survey of mountain streamwater chemistry in Japan in 2022: Comparison of nitrate concentrations with the 2003 survey, Ecological Research, Wiley, English, Refereed, Scientific journal
DOI

林健太郎, Jan. 2024, 持続可能な環境と食料安全保障を両立させる窒素利用の在り方, 農業および園芸, 99 (1), 7-12, Japanese, Invited, Scientific journal

Zhengyang Zhang; Meshal J. Abdullah; Guochang Xu; Kazuyo Matsubae; Xianlai Zeng, Dec. 2023, Countries’ vulnerability to food supply disruptions caused by the Russia–Ukraine war from a trade dependency perspective, Scientific Reports, 13 (1), Refereed, Scientific journal
DOI

Shinsuke Kyoi; Koichiro Mori; Kyohei Matsushita, 14 Oct. 2023, Solution of trade‐offs between food production, water use, and climate change mitigation in global agriculture, Sustainable Development, 32 (3), 2314-2324, Wiley, Scientific journal
DOI

Farah Wirasenjaya; Aurup Ratan Dhar; Azusa Oita; Kazuyo Matsubae, Jul. 2023, Assessment of food-related nitrogen and phosphorus footprints in Indonesia, Sustainable Production and Consumption, 39, 30-41, Elsevier BV, Refereed, Scientific journal
DOI

仁科一哉, Jul. 2023, Nitrogen cycling and reactive nitrogen gas & N2 emissions in agricultural soils at a global scale, Archives of Atmospheric Chemistry Research, 49, Japanese, Refereed, Invited

Kentaro HAYASHI, 25 Apr. 2023, Global Approaches to Address the Nitrogen Issue: Expected Effects on Groundwater Nitrate Pollution, Journal of Geography (Chigaku Zasshi), 132 (2), 75-91, Japanese, Refereed, Invited, Scientific journal
DOI

Kentaro Hayashi; Norihiro Itsubo, Apr. 2023, Damage factors of stratospheric ozone depletion on human health impact with the addition of nitrous oxide as the largest contributor in the 2000s, The International Journal of Life Cycle Assessment, 28, 990-1002, English, Refereed, Scientific journal
DOI

Shinsuke Kyoi; Koichi Kuriyama; Shizuka Hashimoto, Apr. 2023, Relationship between the actual environmental landscape surrounding residents and their willingness to pay for the landscape: Evidence from a discrete choice experiment, Social Sciences & Humanities Open, 8 (1), 100531-100531, Elsevier BV, English, Refereed, Scientific journal
DOI

Kengo Iwata; Shinsuke Kyoi; Yoshiaki Ushifusa, Apr. 2023, Public attitudes of offshore wind energy in Japan: An empirical study using choice experiments, Cleaner Energy Systems, 4, 100052-100052, Elsevier BV, Refereed, Scientific journal
DOI

林健太郎, Feb. 2023, 国際プロジェクトは触媒：国際窒素管理システムを例として, 日本土壌肥料学雑誌, 94 (1), 58-63, Japanese, Invited, Scientific journal

牧野奏佳香; 赤石大輔; 徳地直子, 2023, シチズンサイエンスの勧め, 46 (9), 308-312, Japanese

Kentaro Hayashi, 02 Nov. 2022, Nitrogen cycling and management focusing on the central role of soils: a review, Soil Science and Plant Nutrition, English, Refereed, Invited, Scientific journal
DOI

林健太郎; 柴田英昭; 仁科一哉; 種田あずさ; 杉原創; 早川敦, Jun. 2022, 持続可能な窒素利用に向けた土壌肥料学の挑戦, 日本土壌肥料学雑誌, 93 (3), 152-157, Japanese, Refereed, Scientific journal
DOI

Kazuya Nishina, 01 Feb. 2022, New ammonia demand: ammonia fuel as a decarbonization tool and a new source of reactive nitrogen, Environmental Research Letters, Refereed, Scientific journal
DOI

Hideaki Shibata; Ryosuke Ban; Nanae Hirano; Sadao Eguchi; Shin-Ichiro Mishima; Masaaki Chiwa; Naoyuki Yamashita, Nov. 2021, Comparison of spatial and temporal changes in riverine nitrate concentration from terrestrial basins to the sea between the 1980s and the 2000s in Japan: Impact of recent demographic shifts, Environmental Pollution, 288, 117695-117695, Elsevier BV, English, Refereed, Scientific journal
DOI

Kentaro Hayashi; Hideaki Shibata; Azusa Oita; Kazuya Nishina; Akihiko Ito; Kiwamu Katagiri; Junko Shindo; Wilfried Winiwarter, Oct. 2021, Nitrogen budgets in Japan from 2000 to 2015: Decreasing trend of nitrogen loss to the environment and the challenge to further reduce nitrogen waste, Environmental Pollution, 286, 117559-117559, Elsevier BV, English, Refereed, Scientific journal
DOI

Athanasios Ragkos; Kentaro Hayashi; João Serra; Hideaki Shibata; Efstratios Michalis; Sadao Eguchi; Azusa Oita; Claudia Marques-dos-Santos Cordovil, 26 Apr. 2021, Contrasting Considerations among Agricultural Stakeholders in Japan on Sustainable Nitrogen Management, Sustainability, 13 (9), 4866-4866, MDPI AG, English, Refereed, Scientific journal
DOI

MISC

妹尾啓史; 和穎朗太; 藤井一至; 林健太郎; 國頭恭; 南澤究; 藤原徹, Oct. 2025, 日本土壌肥料学会創立100周年記念事業公開シンポジウムシリーズ「サステイナブルな未来を創る土壌・植物科学」第3回「土壌・生態系保全」, 日本土壌肥料学雑誌, 96 (5), 471-477, Japanese, Introduction scientific journal

林健太郎, Aug. 2025, 中国土壌学会窒素作業部会第6回窒素生物地球化学循環学術フォーラム参加報告, 日本土壌肥料学雑誌, 96 (4), 381-381, Japanese, Introduction scientific journal

Rasmus Einarsson; Lucy Gilliam; Kentaro Hayashi; Kayuza Nishina; Tanner Tuttle; Mark Sutton, May 2025, Opportunities and risks of ammonia as energy carrier in decarbonization strategies, Informative document for 63rd Working Group on Strategies and Review, Task Force on Reactive Nitrogen, UNECE Convention on Long-range Transboundary Air Pollution, English, Invited, Others

林健太郎, Apr. 2025, Sustainable Nitrogen Use for Future Generations, 化学工学, 89 (4), 187-187, Japanese, Invited, Introduction scientific journal

Grace NISHIKAWA; Masako ICHIHARA, 27 Feb. 2025, Climate Litigation in Japan: What to Expect in 2025, Sabin Cener Climate Law Blog, English, Refereed, Introduction commerce magazine

林健太郎; 仁科一哉; 亀井雄; 岩瀬祥子, Feb. 2025, 国内外の窒素管理の研究・政策動向と土壌肥料学への期待, 日本土壌肥料学雑誌, 96 (1), 48-53, Japanese, Invited, Introduction scientific journal
DOI

Okadera T.; Onodera T.; Hanaoka T.; Tsuchiya K.; Nishina K., Jan. 2025, Nitrogen Inventory based on Municipal Population for Sewage into Sanitation Facilities (NIMPO-SISF) in Japan (Ver.2024), Japanese, Others
DOI

浅利美鈴; 林健太郎; イムンジュ; 真常仁志, Oct. 2024, 美味しいだけじゃない！グリーンシェフ教育プログラムの試み, いんだすと, 444, 39-42, Japanese, Invited, Introduction commerce magazine

林健太郎; 仁科一哉, Aug. 2024, 第9回国際窒素会議（N2024）報告, 日本土壌肥料学雑誌, 95 (4), 211-211, Japanese, Invited, Meeting report

林健太郎, 20 Jul. 2024, 持続可能な窒素・リン管理に関する国際動向, 化学物質と環境, (186), 1-4, Japanese, Invited, Introduction other

Shinsuke KYOI; Yuta UCHIYAMA; Koichiro MORI, Sep. 2023, Simulations of Pro-environmental Behavior in Social Networks in Six Countries, Discussion Paper Series E, Shiga University, 27

林健太郎, Aug. 2023, 表紙は語る短い夏にせっせと育つ, 地球研ニュース（Humanity & Nature Newsletter）, (89), 16-16, 総合地球環境学研究所, Japanese, Others

林健太郎; 阿部健一, Aug. 2023, 「あたりまえにある」ゆえに見えにくい窒素のこと, 地球研ニュース（Humanity & Nature Newsletter）, (89), 2-10, 総合地球環境学研究所, Japanese, Others

林健太郎, Aug. 2023, 農・食・環境をつなぐ土壌からみた窒素問題, ペドロジスト, 67 (1), 54-57, Invited

藤原徹; 林健太郎; 中島亨; 加藤拓; 妹尾啓史; 増田曜子; Shen Haoyang; Xu Zhenxing; Zhang Zhengcheng; 山中遥加; 佐藤咲良; 伊藤英臣; 白鳥豊; 大峽広智; 小暮敏博; 高橋嘉夫; Shen Weishou; 柳澤修一; 樋口恭子, Jun. 2023, 地球温暖化に対処する土壌肥料学, 日本土壌肥料学雑誌, 94 (3), 230-235, Japanese, Invited, Introduction scientific journal
DOI

Asano M; Umezawa Y; Kimura A; Saiki M; Tateno R; Hayashi K; Bito T; Nakabayashi M, Apr. 2023, Leaflet. Sustai-N-able Project. Towards Sustainable Nitrogen Use Connecting Human Society and Nature, Research Institute for Humanity and Nature, English, Others

浅野眞希; 梅澤有; 木村文子; 齋木真琴; 舘野隆之輔; 林健太郎; 尾藤環; 中林まどか, Apr. 2023, リーフレット. Sustai-N-ableプロジェクト：人・社会・自然をつないでめぐる窒素の持続可能な利用に向けて, 総合地球環境学研究所, Japanese, Others

林健太郎, Feb. 2022, 日本の窒素収支にみる持続可能な窒素利用に向けた課題, バイオサイエンスとインダストリー, 80 (2), 168-171, Japanese, Invited, Introduction commerce magazine

林健太郎, Oct. 2021, 土壌を要とした窒素の環境動態および人間圏フローの研究, 日本土壌肥料学雑誌, 92 (5), 401-404, Japanese, Invited, Introduction scientific journal

Presentations

下谷将大; 初雪; 布施泰朗; 藤嶽暢英; 田邊優貴子; 工藤栄; 林健太郎; 木田森丸, 南極大陸のコケ植生下土壌における土壌有機物の特徴について, 日本土壌肥料学会関西支部会2025, 11 Dec. 2025, Japanese, Oral presentation

Kentaro Hayashi, An invitation to the 10th International Nitrogen Conference, UNEA-7 Green room event: Sustainable nitrogen solutions for a resilient planet, 08 Dec. 2025, 08 Dec. 2025 12 Dec. - 2025, Invited, English, Public discourse

Makoto Saiki; Shinsuke Kyoi; Kota Kato; Kentaro Hayashi, Exploring key aspects of sustainable diets through a participatory workshop in Miyakojima, Japan, 4th International symposium on Water Environment for Young researchers’ Network, 24 Nov. 2025, English, Poster presentation

Kentaro Hayashi, 10th International Nitrogen Conference: Sustainable Nitrogen Management for Future Generations, 2025 Global Partnership on Nutrient Management Online Meeting, 06 Nov. 2025, 05 Nov. 2025 06 Nov. - 2025, Invited, English, Public discourse

天野浩; 岩崎正利; 中村雄幸; 林健太郎, 流域とともに生きる―アグロエコロジーが示す再生の道, テッラマードレ・ジャパン2025 in 水俣, 01 Nov. 2025, 01 Nov. 2025 03 Nov. - 2025, Invited, Japanese, Public discourse

Kentaro Hayashi, Talking about not carbon but nitrogen, Global Carbon Project (GCP) Science Meeting in Tokyo, 27 Oct. 2025, Invited, English, Public discourse

林健太郎, 窒素問題と国内外の窒素管理の動向, 令和７年度第１回地下水保全を目的とした硝酸性窒素等地域総合対策情報共有会, 24 Oct. 2025, Invited, Japanese, Public discourse

林健太郎, 南極に土壌はないと言われて行ってみた, 京都のタネvol.8, 14 Oct. 2025, Invited, Japanese, Public discourse

林健太郎, 生命進化と環境問題の根源にある窒素, KagaQ月夜サイエンス, 13 Oct. 2025, Invited, Japanese, Public discourse

Kentaro Hayashi; Wilfried Winiwarter, INMS Guidance Document on National Nitrogen Budgets, GPNM & INMS Joint Webinar on New International Guidance and Tools for Sustainable Nitrogen Management, 07 Oct. 2025, 07 Oct. 2025 07 Oct. - 2025, Invited, English, Nominated symposium

Kentaro Hayashi, How we could achieve the Japan’s National Action Plan on Sustainable Nitrogen Management, iN-Net Data Working Group meeting, 01 Oct. 2025, 01 Oct. 2025 01 Oct. - 2025, Invited, English, Nominated symposium

京井尋佑; 岡川梓, 化学肥料・化学農薬に関する農業経営体の意思決定分析, 環境経済・政策学会2025年大会, 21 Sep. 2025, 20 Sep. 2025 21 Sep. - 2025, Japanese, Oral presentation

林健太郎; 村上航; 三輪彩紀子; 山田富久美, 怪談と窒素：捉えがたい窒素問題をアートとの連携で伝える試み, 日本土壌肥料学会2025年度新潟大会, 18 Sep. 2025, 17 Sep. 2025 19 Sep. - 2025, Japanese, Poster presentation

仁科一哉; 茶谷聡; 林健太郎, シナリオに基づく船舶のアンモニア燃料利用が国内の窒素沈着および陸域窒素循環に与える影響の定量評価, 日本土壌肥料学会2025年度新潟大会, 17 Sep. 2025, 17 Sep. 2025 19 Sep. - 2025, Japanese, Oral presentation

Kentaro Hayashi, Role of soil science in sustainable nitrogen management, EUROSOIL2025, 10 Sep. 2025, 08 Sep. 2025 12 Sep. - 2025, English, Oral presentation

Seiyo Iwamoto; Shoki Kosai; Yosuke Shigetomi, Modeling the First Nested Input-Output Table for the Japanese Small Island: The Case of Goto Islands, The 2025 GREENIE International Conference, Sep. 2025, English, Poster presentation

林健太郎, 必要なのにやっかいな窒素：地球環境の現在地を知る, 集ってともに学びましょう地球研（京都）と水俣をむずぶ講座, 26 Aug. 2025, 26 Aug. 2025 26 Aug. - 2025, Invited, Japanese, Public discourse

白水貴; 林健太郎; 加藤知道, 科学絵本の魅力と可能性～センス・オブ・ワンダーの種を蒔く, KagaQ. トークセッション, 03 Aug. 2025, 03 Aug. 2025 03 Aug. - 2025, Invited, Japanese, Public discourse

林健太郎, 窒素問題について：利用がもたらす多様な汚染, サーキュラーマテリアルコンソーシアム第8回目ワークショップ, 27 Jun. 2025, 27 Jun. 2025 27 Jun. - 2025, Invited, Japanese, Public discourse

林健太郎, 農業などの人間活動が窒素循環および人と自然の健全性に及ぼす影響, 日本環境ジャーナリストの会連続講座：人と地球をつなぎ直す－「食」から探るポスト気候変動の課題第4回, 23 May 2025, 23 May 2025 23 May - 2025, Invited, Japanese, Public discourse

Kentaro Hayashi, Identification and reduction of nitrogen waste are essential for effective nitrogen management, 3R International Scientific Conference on Material Cycles and Waste Management (3RINCs) 2025, 12 May 2025, 11 May 2025 12 May - 2025, Invited, English, Invited oral presentation

Kentaro Hayashi, Nitrogen issue: a tradeoff between its use and accompanied pollution, 6th Scientific Forum on Nitrogen Biogeochemical Cycles, China Nitrogen Working Group, 12 Apr. 2025, 11 Apr. 2025 13 Apr. - 2025, Invited, English, Invited oral presentation

Kentaro Hayashi, Recent progresses in international nitrogen management, Seminar at the Institute of Soil Science, Chinese Academy of Sciences, 11 Apr. 2025, 11 Apr. 2025 11 Apr. - 2025, Invited, English, Public discourse

林健太郎; 茶谷聡; 仁科一哉, 窒素沈着による生物多様性影響の量的評価の可能性, 第72回日本生態学会大会, 16 Mar. 2025, 15 Mar. 2025 19 Mar. - 2025, Japanese, Oral presentation

林健太郎, 「窒素循環」の図から何を伝えますか？～持続可能な窒素利用に焦点を当てて考える～, 生物教育研究所セミナー, 09 Mar. 2025, 09 Mar. 2025 09 Mar. - 2025, Invited, Japanese, Public discourse

林健太郎, 円卓会議１「めぐる」学びの底上げに向けて 1. 窒素！, 日本学術会議公開シンポジウム多世代・多分野交流による環境・SDGs教育会議「環境問題に関心のない人をどのように巻き込んでいくか？」, 08 Mar. 2025, 07 Mar. 2025 08 Mar. - 2025, Invited, Japanese, Nominated symposium

粂川遥海; 山末英嗣; 柏倉俊介; 光斎翔貴; 松八重一代; 林健太郎, 死亡率を考慮した食料生産分析における影響, 第20回日本LCA学会研究発表会, 06 Mar. 2025, 05 Mar. 2025 07 Mar. - 2025, Japanese, Poster presentation

Suyadi TA; Furukawa R.; Hayashi K.; Onodera T.; Nishina K.; Itsubo N., Evaluating greenhouse gasses emission from domestic wastewater treatment in each prefecture in Japan, 第20回日本LCA学会研究発表会, 06 Mar. 2025, 05 Mar. 2025 07 Mar. - 2025, English, Oral presentation

神代将輝; 光斎翔貴; 柏倉俊介; 山末英嗣; 仁科一哉; 松八重一代; 林健太郎, アンモニア燃料船への転換における二酸化炭素と反応性窒素の排出量分析, 第20回日本LCA学会研究発表会, 05 Mar. 2025, 05 Mar. 2025 07 Mar. - 2025, Japanese, Oral presentation

林健太郎, 生態系・食料システムを支える窒素循環, 日本土壌肥料学会創立100周年記念事業公開シンポジウムシリーズ「サステイナブルな未来を創る土壌・植物科学」第3回土壌・生態系保全, 02 Mar. 2025, 02 Mar. 2025 02 Mar. - 2025, Invited, Japanese, Nominated symposium

林健太郎, 必要でやっかいなもの～あなたと窒素の深い関係, 大手町アカデミア×人間文化研究機構, 25 Feb. 2025, 25 Feb. 2025 25 Feb. - 2025, Invited, Japanese, Public discourse

林健太郎, 窒素管理がやってきました, 地球研メディア懇談会, 20 Feb. 2025, 20 Feb. 2025 20 Feb. - 2025, Invited, Japanese, Public discourse

林健太郎, 大気環境と窒素管理, 大気環境総合センターセミナー, 18 Feb. 2025, 18 Feb. 2025 18 Feb. - 2025, Invited, Japanese, Public discourse

林健太郎, 絵本を読もう地球研DAYS－奇妙で不思議な土の世界, 金沢21世紀美術館×地球研アニマ・レイヴ存在の交差点で踊る地球研DAYS, 15 Feb. 2025, 15 Feb. 2025 16 Feb. - 2025, Invited, Japanese, Others

Kentaro Hayashi, Sense of the Unseen Vol.1 “Ghost Story and Nitrogen”, RIHN-KLASICA Workshop 2025, 11 Feb. 2025, 11 Feb. 2025 11 Feb. - 2025, Invited, English, Nominated symposium

林健太郎, 温暖化や社会課題などのマルチイシューの背景にある窒素問題, 第4回 Future Earth 日本サミット：私たちが選ぶ未来―地球温暖化と社会の分断の先にあるもの―, 09 Feb. 2025, 09 Feb. 2025 10 Feb. - 2025, Invited, Japanese, Keynote oral presentation

林健太郎, 2025年初における窒素問題の動向について, 持続可能な窒素管理を考えるシンポジウム, 17 Jan. 2025, 17 Jan. 2025 17 Jan. - 2025, Invited, Japanese, Nominated symposium

Kentaro Hayashi, Session 2: Guided Panel Discussion followed by Q&A, UNEP-GEO Blue Planet Nutrient Management Workshop, 09 Jan. 2025, 09 Jan. 2025 09 Jan. - 2025, Invited, English, Nominated symposium

林健太郎, 本格展開が始まった国内外の窒素管理にフューチャー・デザインはどうコミットしていけるのか, フューチャー・デザイン・ワークショップ, 17 Dec. 2024, 17 Dec. 2024 17 Dec. - 2024, Invited, Japanese, Public discourse

林健太郎, 窒素問題と窒素管理をめぐる国際・国内動向, 日本土壌肥料学会関西支部講演会, 05 Dec. 2024, 05 Dec. 2024 06 Dec. - 2024, Japanese, Oral presentation

林健太郎; 棚橋弘季; 山田富久美, デザイン・アートがひらく、アウトリーチのかたち「怪談と窒素」から考える、新たな研究価値の伝え方, FabCafe Tokyoトークイベント, 21 Nov. 2024, 21 Nov. 2024 21 Nov. - 2024, Invited, Japanese, Public discourse

Suyadi TA; Furukawa R.; Itsubo N.; Hayashi K.; Kyoi S.; Onodera T.; Nishina K., Environmental damage cost assessment of domestic wastewater treatment in Japan based on LIME model, EcoBalance 2024, 06 Nov. 2024, 04 Nov. 2024 06 Nov. - 2024, English, Oral presentation

Oita A.; Shigetomi Y.; Crowe D.; Leach AM; Galloway JN; Hayashi K., Launch of Japan version in the N-Print Calculator: a web-based nitrogen footprint tool, EcoBalance 2024, 05 Nov. 2024, 04 Nov. 2024 06 Nov. - 2024, English, Poster presentation

林健太郎, 地球環境問題の根源～窒素を手に入れた人類, 地球環境学講座, 25 Oct. 2024, 25 Oct. 2024 25 Oct. - 2024, Invited, Japanese, Public discourse

林健太郎, 窒素問題に対する世界の取り組みとその地下水硝酸性窒素汚染への影響, 2024年度東京地学協会定期講演会, 05 Oct. 2024, 05 Oct. 2024 05 Oct. - 2024, Invited, Japanese, Public discourse

Mark Sutton; Gabrielle de Souza; Jean Ometto; Arthur Beusen; Claudia Caporusso; Tapan Adhya; Abas Basir; Cargele Masso; Zameela Ahmed; Kentaro Hayashi; Will Brownlie; Mihai Constantinescu; Ramesh Ramachandran; Isabelle van der Beck, Mobilising global and regional action on nitrogen and nutrient pollution for a healthy planet, 10th GEF International Waters Conference, 25 Sep. 2024, 23 Sep. 2024 26 Sep. - 2024, Invited, English, Invited oral presentation

林健太郎, オーフス窒素ワークショップにおけるフューチャー・デザイン体験イベントの報告, フューチャー・デザイン2024, 15 Sep. 2024, 14 Sep. 2024 15 Sep. - 2024, Japanese, Oral presentation

林健太郎, 国際窒素管理および国際窒素評価書の紹介と土壌学への期待, 2024年度日本土壌肥料学会福岡大会シンポジウムVI, 05 Sep. 2024, 03 Sep. 2024 05 Sep. - 2024, Invited, Japanese, Nominated symposium

仁科一哉; 林健太郎; 林岳彦; 沖山誠; 近藤哲朗; 早川敦; 朝田景; 種田あずさ; 花岡達也; 土屋一彬; 小野寺崇; 岡寺智大; 鵜飼七緒子; 五十嵐達海, 耕種・畜産農業における窒素管理手法ロジックモデルの開発, 2024年度日本土壌肥料学会福岡大会, 04 Sep. 2024, 03 Sep. 2024 05 Sep. - 2024, Japanese, Poster presentation

林健太郎; 棚橋弘季; 浦野奈美; 岡田小枝子; 菊竹栄杜; 木村文子; 京井尋佑; 後閑裕太朗; 柴田幸子; 竹腰麻由; 田根佐和子; 齋木真琴; 三輪彩紀子; 山田富久美, システム思考を用いた窒素問題の解釈, 2024年度日本土壌肥料学会福岡大会, 03 Sep. 2024, 03 Sep. 2024 05 Sep. - 2024, Japanese, Oral presentation

Jiahuan Wang; Yosuke Shigetomi; Andrew Chapmam, The relationship between racial diversity and environmental footprints, ISIE Socio-Economic Metabolism and Asia-Pacific Conference 2024, 26 Aug. 2024, 25 Aug. 2024 27 Aug. - 2024, English, Oral presentation

Yosuke Shigetomi; Yin Long; Andrew Chapman, Detailing the food waste and the related environmental footprints across the households; the case of Japan, ISIE Socio-Economic Metabolism and Asia-Pacific Conference 2024, 26 Aug. 2024, 25 Aug. 2024 27 Aug. - 2024, English, Oral presentation

小野寺崇; 岡寺智大; 仁科一哉; 土屋一彬; 花岡達也; 林健太郎, 窒素問題に対する汚水処理事業の貢献～下水汚泥の有する窒素ポテンシャルの推定～, 第61回下水道研究発表会, 31 Jul. 2024, 30 Jul. 2024 01 Aug. - 2024, Japanese, Poster presentation

Kentaro Hayashi; Makoto Saiki; Shinsuke Kyoi; Masako Ichihara; Yoshinori Nakagawa; Tatsuyoshi Saijo, Challenge of nitrogen communications with multi-stakeholders, 22nd International Nitrogen Workshop, 21 Jun. 2024, 17 Jun. 2024 21 Jun. - 2024, English, Poster presentation

Makoto Saiki; Shinsuke Kyoi; Kentaro Hayashi, Developing a hands-on experience package on food and the environment from a nitrogen perspective, 22nd International Nitrogen Workshop, 21 Jun. 2024, 17 Jun. 2024 21 Jun. - 2024, English, Poster presentation

Kentaro Hayashi; Makoto Saiki; Shinsuke Kyoi; Ayako Kimura; Masako Ichihara, Future Design Workshop (2), 22nd International Nitrogen Workshop, 20 Jun. 2024, 17 Jun. 2024 21 Jun. - 2024, English, Public discourse

Kentaro Hayashi; Makoto Saiki; Shinsuke Kyoi; Ayako Kimura; Masako Ichihara, Future Design Workshop (1), 22nd International Nitrogen Workshop - Side event, 18 Jun. 2024, 17 Jun. 2024 21 Jun. - 2024, English, Public discourse

Shinsuke Kyoi; Kayo Murakami; Koichi Kuriyama; Kentaro Hayashi, How much do consumers care about their nitrogen footprint?: A comparative study with other environmental labels, 22nd International Nitrogen Workshop, 18 Jun. 2024, 17 Jun. 2024 21 Jun. - 2024, English, Oral presentation

Masako Ichihara, Reiichiro Ishii, Yoshinori Nakagawa, Tatsuyoshi Saijo, Tetsuzo Yasunari, Pursuing just and transformative adaptation to climate change through equal multi-stakeholder communication: A Case Study conducted by Kyoto Climate Change Adaptation Center, N Workshop 2024, 18 Jun. 2024, English

Makoto Saiki; Shinsuke Kyoi; Kentaro Hayashi, Developing a hands-on experience package on food and the environment from a nitrogen perspective, The XII International Nitrogen Workshop, 21 May 2024, Poster presentation

Kentaro Hayashi, Implications of the planetary health diet to the nitrogen issue: a soil health and food security perspective, Centennial Celebration and Congress of the International Union of Soil Sciences, 19 May 2024, 19 May 2024 21 May - 2024, Invited, English, Poster presentation

Jung W; Fujiwara T; Asari M; Hayashi K, Environmental assessment of a local resource circulation scheme: a case study on integration of anaerobic digestion and rice cultivation in Keihoku, Kyoto, 3R International Scientific Conference on Material Cycles and Waste Management 2024, 17 Mar. 2024, 15 Mar. 2024 17 Mar. - 2024, English, Poster presentation

重富陽介; 石神あすか, 日本の家庭系食品廃棄物構造とそのライフサイクル影響の解析, 第19回日本LCA学会研究発表会, 07 Mar. 2024, 06 Mar. 2024 08 Mar. - 2024, Japanese, Oral presentation

林健太郎, 大切でやっかいな「あたりまえにある」窒素のこと, 京都大学生態学研究センター公開講演会第15回「ありふれているのに知らない窒素の話」, 17 Feb. 2024, 17 Feb. 2024 17 Feb. - 2024, Invited, Japanese, Public discourse

Kentaro Hayashi, Overall story about the nitrogen issue connected to the atmosphere, Sustainable nitrogen management seminar: accumulation of nitrogen data in EANET, 16 Feb. 2024, 16 Feb. 2024 16 Feb. - 2024, Invited, English, Public discourse

林健太郎; 棚橋弘季, 複雑な窒素問題をシステム思考でひもとく, GREEN×GLOBE Partnersトークイベント：システム思考で取り組む複雑な環境課題・社会課題の解決－方法論と実践－, 14 Feb. 2024, 14 Feb. 2024 14 Feb. - 2024, Invited, Japanese, Public discourse

Kazuya Nishina; Kentaro Hayashi; Azusa Oita; Kei Asada; Atsushi Hayakawa; Tomohiro Okadera; Kenji Tsuchiya; Takashi Onodera; Tatsuya Hanaoka; Koya Kobayashi, Meta-analysis of domestic synthetic N fertilizer reduction experiments for the new fertilizer reduction targets in Japan, 9th International Nitrogen Conference, 08 Feb. 2024, 05 Feb. 2024 08 Feb. - 2024, English, Oral presentation

Misuzu Asari; Wanseop Jung; Toshio Mitsumoto; Kazuyo Matsubae; Kentaro Hayashi, A practical research on constructing a nitrogen circulation system utilizing a small-scale biogassfication plant, 9th International Nitrogen Conference, 07 Feb. 2024, 05 Feb. 2024 08 Feb. - 2024, English, Oral presentation

Takashi Onodera; Tomohiro Okadera; Kazuya Nishina; Kenji Tsuchiya; Tatsuya Hanaoka; Kentaro Hayashi, Estimation of the amount of nitrogen waste as sludge produced from sewage treatment plant in Japan, 9th International Nitrogen Conference, 06 Feb. 2024, 05 Feb. 2024 08 Feb. - 2024, English, Oral presentation

Kentaro Hayashi; Kazuya Nishina; Keisuke Koba; Kazuyo Matsubae; Koichi Kuriyama; Tatsuya Hanaoka, Nitrogen management research projects in Japan towards sustainable nitrogen use, 9th International Nitrogen Conference, 06 Feb. 2024, 05 Feb. 2024 08 Feb. - 2024, English, Oral presentation

Kentaro Hayashi, National and international activities towards sustainable nitrogen use, 令和5年度IoPプロジェクト国際シンポジウム持続可能な施設園芸に向けたIoPの挑戦, 28 Jan. 2024, 28 Jan. 2024 28 Jan. - 2024, Invited, Japanese, Invited oral presentation

Kentaro Hayashi, Sustai-N-able project aiming stakeholder engagement, 5th UNEP Working Group on Nitrogen, Global Partnership on Nutrient Management, United Nations Environment Programme, UNEP Headquarter, Nairobi, 09 Jan. 2024, 09 Jan. 2024 10 Jan. - 2024, Invited, English, Invited oral presentation

林健太郎, 持続可能な窒素利用に向けたステークホルダーエンゲージメント, 第3回窒素循環シンポジウム「窒素管理に関する世界の動向と国内の取り組み」, 27 Nov. 2023, 27 Nov. 2023 27 Nov. - 2023, Invited, Japanese, Nominated symposium

牧野奏佳香; 徳地直子; 赤石大輔; 小山里奈; 駒井幸雄; 板谷佳美; Nay Lin Maung; 石丸香苗; 稲垣善之; 小田智基; 柴田嶺; 沼本晋也, 日本全国における渓流水水質の分布とその経年変化～シチズンサイエンスによる広域再調査, 京都大学フィールド研創設20周年記念式典・シンポジウム, 京都大学フィールド科学教育研究センター, 京都大学吉田キャンパス時計台記念館, 19 Nov. 2023, Japanese, Poster presentation

林健太郎, 国際窒素管理の動向と大気・水環境との関係, 水・大気環境連携セミナー－地域環境研究の未来に向けて－, 31 Oct. 2023, Invited, Japanese, Public discourse

渡貫淳子; 岩本雄平; 佃知彦; 高橋良和; 林健太郎; 浅利美鈴, 京北「もったいない」食堂, 第39回SDGs問答, 28 Oct. 2023, Invited, Japanese, Nominated symposium

林健太郎, 窒素利用の便益と窒素汚染の脅威というジレンマ, 大学共同利用機関シンポジウム2023, 22 Oct. 2023, Invited, Japanese, Nominated symposium

林健太郎, 環境問題の根底に隠れている窒素～利用と汚染のトレードオフ, 公益財団法人新産業創造研究機構（NIRO）セミナー, 17 Oct. 2023, Invited, Japanese, Public discourse

林健太郎, 持続可能な環境と食料安全保障を両立させる窒素利用の在り方, 2023年度日本農学会シンポジウム, 07 Oct. 2023, Invited, Japanese, Invited oral presentation

Kentaro Hayashi; Nobusuke Iwasaki, Nitrogen use and right crop for right land towards sustainable food production and consumption, Tsukuba Conference 2023, 28 Sep. 2023, 26 Sep. 2023 28 Sep. - 2023, Invited, English, Nominated symposium

Kentaro Hayashi, Nitrogen management for sustainable food production and consumption, Polish–Japanese Workshop on Circular Economy in Agriculture and Agro-Industry, 15 Sep. 2023, Invited, English, Invited oral presentation

林健太郎; 仁科一哉; 種田あずさ, 日本の作物生産の窒素利用効率はなぜ低いのか, 日本土壌肥料学会愛媛大会, 13 Sep. 2023, 12 Sep. 2023 14 Sep. - 2023, Japanese, Oral presentation

仁科一哉; 林健太郎; 朝田景; 種田あずさ; 早川敦; 小林耕野, 減肥試験のメタ解析による国内の化学窒素肥料使用量の削減に関する検討, 日本土壌肥料学会愛媛大会, 13 Sep. 2023, 12 Sep. 2023 14 Sep. - 2023, Japanese, Oral presentation

Shinsuke KYOI; Koichiro MORI; Kyohei MATSUSHITA, Evaluation of Trade-offs between Three SDGs in Global Agriculture: Food production, Water use, and Climate change mitigation, The 3rd International symposium on Water Environment for Young researchers’ Network 2023, 08 Sep. 2023, 08 Sep. 2023 09 Sep. - 2023

林健太郎, 窒素問題もまた人間文化の問題である, 文部科学省広報室・人間文化研究機構メディア懇談会, 06 Sep. 2023, Invited, Japanese, Public discourse

林健太郎, オーガニックと窒素のおいしい関係, 「食と環境」オンライン公開セミナー2023 第2回, 22 Jul. 2023, Invited, Japanese, Public discourse

Kentaro Hayashi, Soil, essential for food production, is under pressure from both the nitrogen issue and food security, 4th Global Soil Security Conference, Korean Society of Soil Science and Fertilizer, Seoul, 29 Jun. 2023, 26 Jun. 2023 29 Jun. - 2023, Invited, English, Invited oral presentation

林健太郎, 国際的な窒素管理に向けた大気沈着研究について考える, 第34回酸性雨東京講演会, 大気環境学会関東支部大気沈着部会, オンライン配信, 09 Jun. 2023, 09 Jun. 2023 09 Jun. - 2023, Invited, Japanese, Public discourse

林健太郎, 産業・エネルギー分野も窒素利用と窒素汚染のトレードオフである窒素問題に関与, 石油学会第65回年会, 公益社団法人石油学会, タワーホール船堀（東京）, 29 May 2023, 29 May 2023 30 May - 2023, Invited, Japanese, Invited oral presentation

Kentaro Hayashi, Atmosphere–land interaction aspects of the nitrogen issue, 10th Acid Rain Conference (Acid Rain 2020), 20 Apr. 2023, 18 Apr. 2023 21 Apr. - 2023, Invited, English, Keynote oral presentation

Soyoka Makino; Naoko Tokuchi; Daisuke Akaishi; Lina Koyama; Yukio Komai; Yoshimi Itaya; Nay Lin Maung; Kazuya Nishina; Keisuke Koba; Kentaro Hayashi, Changes in Spatial Distribution of Stream Nitrate Concentrations throughout Japan over 20 Years: A Resurvey using Citizen Science, Acid Rain 2020, 18 Apr. 2023, English, Oral presentation

一原雅子, 農家の方々と描く、気候変動下における農業の将来像：アンケート調査のねらい, 与謝野のコメの未来を考える～京の豆っこ米に関する調査結果と、大江山蛇紋岩がコメに及ぼす影響について～, 01 Mar. 2023, Japanese, Public discourse

重富陽介, 日本の食生活に伴うライフサイクル環境負荷量, 美食地政学講座・廃棄物資源循環学会東北支部 2022年度地区講演会, 25 Jan. 2023, 25 Jan. 2023 25 Jan. - 2023, Invited, Japanese, Public discourse

林健太郎, Too muchとtoo littleを解消した持続可能な窒素利用を目指して, 第1回北大・地球研連携協定記念シンポジウム, 25 Nov. 2022, Invited, Japanese, Invited oral presentation

林健太郎, 地球研プロジェクト「人・社会・自然をつないでめぐる窒素の持続可能な利用に向けて」の紹介, 第2回窒素循環シンポジウム「窒素循環に関する世界的課題と日本における取組み」, 21 Nov. 2022, Invited, Japanese, Keynote oral presentation

林健太郎, 窒素問題：窒素利用の便益と窒素汚染の脅威のトレードオフ, 2022年度日本土壌肥料学会関東支部大会, 20 Nov. 2022, Invited, Japanese, Invited oral presentation

Kentaro Hayashi, Status of Nitrogen Management Activities in the World, 4th Biannual Meeting of BNI-International Consortium, 17 Nov. 2022, Invited, English, Invited oral presentation

Hayashi K; Koba K; Kuriyama K; Matsubae K; Shibata H, Towards sustainable nitrogen use: the launch of inter- and trans-disciplinary research, EcoBalance 2022, 02 Nov. 2022, 30 Oct. 2022 02 Nov. - 2022, English, Oral presentation

Hayashi K; Nakagawa Y; Shibata H; Koba K; Matsubae K; Kuriyama K; Saijo T, Futurability of our nitrogen use connecting humanity and nature, XXI International Nitrogen Workshop, 28 Oct. 2022, 24 Oct. 2022 28 Oct. - 2022, English, Oral presentation

Zhengyang ZHANG; Meshal J. ABDULLAH; Kazuyo MATSUBAE, Potentials for Food Self-sufficiency Improvement through Indoor Vertical Farming in Kuwait, The 14th International Society for Industrial Ecology-Socio-Economic Metabolism Section (ISIE-SEM) Conference, 20 Sep. 2022, 19 Sep. 2022 21 Sep. - 2022, English, Poster presentation

林健太郎, 温暖化にも関わる窒素問題：食と土壌と窒素の深い関係, 2022年度日本土壌肥料学会東京大会公開シンポジウム, 15 Sep. 2022, Invited, Japanese, Invited oral presentation

林健太郎, 農・食・環境をつなぐ土壌からみた窒素問題, 日本ペドロジー学会第61回公開シンポジウム「自然保護・環境教育に貢献するペドロジー」, 19 Aug. 2022, Invited, Japanese, Public discourse

林健太郎, 北極と南極にも土壌があることを知って欲しい, 日本ペドロジー学会第7回ワンポイントセミナー「ジオパークと土壌教育」, 18 Aug. 2022, Japanese, Public discourse

中川善典, 持続可能な食と窒素の深い関係：グリーンジョブのフューチャー・デザイン, 美食を支える人が創る地球の未来～Sustainable Gastronomy Day～, 18 Jun. 2022, Japanese, Public discourse

Kentaro Hayashi, Application for nitrogen budgets: INMS and beyond, EPNB-19, Expert Panel on Nitrogen Budget, Taskforce on Reactive Nitrogen, CLRTAP, 01 Jun. 2022, Invited, English

林健太郎, 持続可能な窒素利用の実現に求められる陸域生態系研究, 日本地球惑星科学連合2022年大会, 26 May 2022, Invited, Japanese, Invited oral presentation

林健太郎; 常田岳志; 荒井見和; 酒井英光; 中村浩史; 長谷川利拡, 高CO2は水稲の施肥窒素の利用効率に影響しない：長期的には地力窒素減耗の可能性, 日本地球惑星科学連合2022年大会, 26 May 2022, Japanese, Oral presentation

林健太郎, 地球規模の窒素循環と窒素利用の持続可能性, 令和3年度化学物質環境実態調査環境科学セミナー, 17 Jan. 2022, Invited, Japanese, Public discourse

Kentaro Hayashi; Hideaki Shibata; Azusa Oita; Kazuya Nishina; Kiwamu Katagiri; Junko Shindo; Wilfried Winiwarter, Economy-wide and food system nitrogen budgets in Japan from 2000 to 2015, AGU2021, 17 Dec. 2021, English, Oral presentation

林健太郎, 窒素利用の問題に関する世界の動向, 産総研シンポジウム：窒素循環における課題とその解決にむけて, 08 Nov. 2021, Invited, Japanese, Nominated symposium

Kentaro Hayashi, National Nitrogen Budgets in INMS, EPNB-18, Expert Panel on Nitrogen Budget, Taskforce on Reactive Nitrogen, CLRTAP, 06 Oct. 2021, Invited, English, Public discourse

林健太郎, 人類の窒素利用と環境影響との関係, 2021年度SPEED研究会第4回研究会, 01 Oct. 2021, Invited, Japanese, Public discourse

林健太郎, 窒素管理研究の最前線と土壌肥料学に期待される貢献, 2021年度日本土壌肥料学会北海道大会シンポジウム：持続可能な窒素利用に向けた土壌肥料学の挑戦, 16 Sep. 2021, Japanese, Nominated symposium

林健太郎, 人と自然の健康を結ぶ「窒素」～賢明な窒素利用は「持続可能で豊かな食」の礎～, 食生活ジャーナリストの会2021年度西日本支部第2回勉強会, 13 Sep. 2021, Invited, Japanese, Public discourse

林健太郎, 人類の窒素利用トレードオフの解決に向けた世界の取り組み, ムーンショット事業窒素循環プロジェクトウェビナー, 05 Jul. 2021, Invited, Japanese, Public discourse

林健太郎, 人間活動に伴う窒素循環のかく乱とその解決に向けた取り組み, 理研ハッカソン公開シンポジウム, 22 Mar. 2021, Invited, Japanese, Nominated symposium

林健太郎, 持続可能な窒素利用に向けて, 環境監査研究会, 06 Dec. 2020, 06 Dec. 2020 06 Dec. - 2020, Invited, Japanese, Public discourse

Works

Movie to tell the Nitrogen Issue, RIHN; Loftwork, Apr. 2024

窒素問題を伝える動画, 総合地球環境学研究所; ロフトワーク, Apr. 2024

Encounter of a natural scientist with Future Design: The case of Ken (movie in English), Nakagawa Y; Hayashi K; Saijo T, Sep. 2022

ある自然科学者とフューチャー・デザインとの出会い：ケンさんの場合（動画・日本語版）, 中川善典; 林健太郎; 西條辰義, Sep. 2022

Academic Contribution

与謝野町報告会, Academic society etc, 総合地球環境学研究所Sustai-N-ableプロジェクト，京都府立大学, 01 Mar. 2024, 01 Mar. 2024

Social Contribution

地球に上賀茂あり, 京都新聞, 京都新聞夕刊1面現代のことば, 28 Aug. 2025, 28 Aug. 2025, Paper

必要なのにやっかいな窒素：地球環境の現在地を知る, 環不知火プランニング, 集ってともに学びましょう地球研（京都）と水俣をむずぶ講座, 26 Aug. 2025, 26 Aug. 2025, Lecture

展示・ショー・対話ラボ, 京都超SDGsコンソーシアム, 2025大阪・関西万博関西パビリオン京都ゾーン「環境・SDGs」ウィークス EXPO KYOTO超SDGsみらいラボ, 06 Aug. 2025, 06 Aug. 2025, Festival

私たちと自然をつなぐ物質のめぐりを学ぶ, 京都市青少年科学センター, 未来のサイエンティスト養成講座体験コース, 24 Jul. 2025, 24 Jul. 2025, Seminar

窒素をめぐる環境問題, 京都府教育委員会、亀岡市立大井小学校, 14 Jul. 2025, 14 Jul. 2025, Visiting lecture

窒素をめぐる環境問題, 京都府教育委員会、与謝野町立加悦中学校, 29 Nov. 2024, 29 Nov. 2024, Visiting lecture

北極と南極ってどんなところ？, 京都府教育委員会、京都府立北稜高等学校, 22 Nov. 2024, 22 Nov. 2024, Visiting lecture

「持続可能な窒素管理に関する行動計画」の策定について, 環境省, 「持続可能な窒素管理に関する行動計画」のプレスリリース, 27 Sep. 2024, 環境省ウェブサイト報道発表資料, Others

Multi-Country N-Print Calculator / Japan, University of Virginia, Nitrogen Footprint (N-Print) website, Apr. 2024, 9999, N-Print Calculator, Internet

第15回HOPEミーティング見学対応, 日本学術振興会, 第15回HOPEミーティングにおける総合地球環境学研究所の見学, 28 Feb. 2024, 28 Feb. 2024, Others

アースデイ in 京都 2023 地球研ブース, 総合地球環境学研究所, アースデイ in 京都 2023, 23 Apr. 2023, 23 Apr. 2023, 地球研ウェブサイト「ニュース」欄, Meeting

人と自然をつなぐ窒素の持続可能な利用：将来世代も幸せであるために, 京都府与謝野町, 01 Mar. 2023, 01 Mar. 2023, Seminar

「窒素の循環」と「食」を考える, 京都大学超SDGsシンポジウム事務局, SDGs問答, 26 Feb. 2023, 26 Feb. 2023, Seminar

"窒素"が環境問題を引き起こしている？, 日本科学未来館, 科学コミュニケーターブログ, 13 Jan. 2023, 13 Jan. 2023, 日本科学未来館科学コミュニケーターブログ, Internet

Media Coverage

環境保全へ「山の健康診断」京大とモンベル市民参加で大規模調査, Other than myself, 京都新聞, 11 Aug. 2022, Paper

京都大学×モンベル「山の健康診断」水質分析に登山者も協力, Other than myself, 山と渓谷社, 山と渓谷, Jul. 2022, Paper

【グッドアイデア】紙袋を次の人に…再利用進める「ナイスパス」とは？, 長崎国際テレビ, NIB news every., 15 Mar. 2022, Media report

窒素汚染を減らす食生活の知恵，［特集］地球は一つの生命体自然とはなんだろう？そのしくみとは, Other than myself, 正食協会, むすび, 01 Jun. 2025, 69巻2号4-12, Paper

温室のバナナは、きっとゴリラもヒトも喜ばす――地球研と21美が手を取り合って踊り狂った展覧会「アニマ・レイブ」, Other than myself, 大日本印刷, アートスケープ, 21 May 2025, Internet

必要でやっかいなもの～あなたと窒素の深い関係トークセッション, Other than myself, 人間文化研究機構×大手町アカデミア, 読売新聞オンライン, 10 Mar. 2025, Internet

必要でやっかいなもの～あなたと窒素の深い関係講演要旨, Other than myself, 人間文化研究機構×大手町アカデミア, 読売新聞オンライン, 10 Mar. 2025, Internet

ごみを燃やさず自然に戻す―「生ごみの処理」と「窒素管理」の研究を紹介, Other than myself, 環境新聞, 環境新聞, 05 Mar. 2025, 3面環境総合／脱炭素・エネルギー, Paper

必要でやっかいなもの～あなたと窒素の深い関係, Other than myself, 大手町アカデミア×人間文化研究機構, 大手町アカデミア×人間文化研究機構, 25 Feb. 2025, YouTube, Internet

166. 未来への期待と不安が交錯した2024年、クリエイターとの共創で導いた5つの「別解」, Other than myself, ロフトワーク, LOFTWORK MAGAZINE SPECIAL - from 2024 to 2025-, 26 Dec. 2024, ４）環境課題の複雑性をアート体験で紐解く展示専門的な環境課題をアート体験で伝える総合地球環境学研究所「怪談と窒素」展, Internet

必要でやっかいなもの～あなたと窒素の深い関係, Other than myself, 読売新聞, 読売新聞オンライン, 23 Dec. 2024, 大手町アカデミア, Internet

環境課題への気づきをデザイン目に見えない窒素をアートで体感「窒素と怪談」展, Other than myself, ロフトワーク, ロフトワークウェブサイト, 29 Nov. 2024, Internet

研究者とクリエイターが共創し、目に見えない存在を知覚するプロジェクト「Sense of the Unseen Vol.1」, Other than myself, ロフトワーク, ロフトワークウェブサイト, 20 Nov. 2024, Internet

Formulation of Japan’s National Action Plan on Sustainable Nitrogen Management, Other than myself, Ministry of the Environment, Japan, MoE website, 18 Nov. 2024, Internet

環境問題の現状教職員ら学ぶ, Other than myself, 京都新聞社, 京都新聞, 26 Oct. 2024, 朝刊21面, Paper

探求人危機へ多分野の知見結集, Other than myself, 京都新聞社, 京都新聞, 22 Sep. 2024, 朝刊7面, Paper

富栄養化や温暖化引き起こす窒素の恐怖怪談で体感, Other than myself, 京都新聞社, 京都新聞, 29 Aug. 2024, 夕刊1面, Paper

「Sense of the Unseen vol.1 怪談と窒素」オープンアーカイブス, Other than myself, ロフトワーク, ロフトワークウェブサイト, 19 Aug. 2024, Internet

「空気」を読む、聴く、味わう。五感を頼りに、窒素問題を体験する『怪談と窒素』展, Other than myself, ロフトワーク, ロフトワークウェブサイト, 19 Aug. 2024, Internet

知られざる「窒素問題」を解きほぐす「システム思考」――見えない「つながり」を可視化し変革へ導く方法論, 三井住友フィナンシャルグループ, GREEN×GLOBE Partners, 14 Apr. 2024, GGPウェブサイト, Internet

地球研でサステイナビリティについて学ぶ恐竜のフランキー, Other than myself, UNDP駐日代表事務所, UNDP駐日代表事務所YouTubeチャンネル, Apr. 2024, 動画, Internet

窒素問題の理解促進に向けて複雑な課題への打ち手を導く、システム思考を使ったワークショップ, Other than myself, ロフトワーク, ロフトワークウェブサイト, 14 Mar. 2024, Our Project & Event: Work, Internet

日本は"窒素メタボ" 環境汚染や富栄養化、地球温暖化にも影響, Other than myself, 京都新聞, 京都新聞, 10 Mar. 2024, 朝刊9面暮らし, Paper

Sustainable Nitrogen Management Seminar: Experts Convene to Address Global Challenges, Other than myself, Asia Center for Air Pollution Research, Acid Deposition Monitoring Network in East Asia (EANET) website, 23 Feb. 2024, News, Internet

脱炭素の次は「窒素」排出急増も国際ルール策定は難題, Other than myself, 日本経済新聞, 日本経済新聞, 01 Feb. 2024, 電子版, Paper

南極に学ぶ「もったいない」, 京都新聞, 京都新聞, 22 Dec. 2023, 朝刊6面暮らし, Paper

窒素排出次の環境問題, 京都新聞, 京都新聞, 22 Feb. 2023, 朝刊8面暮らし, Paper

窒素化合物の排出を国際管理：土・水・大気汚染に危機感, Other than myself, 日本経済新聞社, 日本経済新聞, 21 Mar. 2022, 朝刊20面ニュースな科学, Paper

地球環境問題の解決の鍵は食と食文化にあり, Myself, クールジャパン官民連携プラットホーム, クールジャパン官民連携プラットホーム公式ウェブサイト, Mar. 2022, https://cjpf.jp/column/detail/index/26, Internet

窒素の環境負荷、国際課題に：アンモニア発電で対策必要, Other than myself, 日本経済新聞社, 日本経済産業新聞, 04 Feb. 2022, 2面エネルギーエコロジー Earth 新潮流, Paper

日本人の窒素排出、世界の2倍, Other than myself, 日本経済新聞社, 日本経済産業新聞, 24 Sep. 2021, 9面イノベーション, Paper

15年間の窒素収支解明, Other than myself, 日本農業新聞, 日本農業新聞, 25 Aug. 2021, 12面営農, Paper

農研機構など、人為的活動に由来する窒素を包括的に評価, Other than myself, 国立環境研究所, 環境展望台, 24 Aug. 2021, Internet

Research Institute for Humanity and Nature

Research Database

Towards Sustainable Nitrogen Use Connecting Human Society and Nature

Basic Information

Basic information

Progress and Results (2025 Year)

1.Executive summary

1) Objectives and background

2) How does the research contribute to the solution of the global environmental problems?

3) Methodology, structure and schedule

4) Expected results

5) Project organization and membership

2. Project progress during the FR period to date

1) Project overall progress

Results including methodological development and project organization formed

Level of achievement in the whole research plan

Outcomes beyond expectation

Challenges encountered and their possible solutions

2) Amendments to research objectives, methodology and organization as applicable

3. Self-diagnosis of research results in this year

1) Results achieved this year

Research results from the previous EREC review.

What part of the project final outcome has been achieved

2) Results can be evaluated as having overfulfilled

3) Points to be evaluated that the goals were not reached

4) Notable achievements and challenges as to contribution to the RIHN programs

5. Research plan for next year

Natural Cycling Unit:

Human Society Unit:

Economic Evaluation Unit:

Future Design Unit:

6. Tasks for the next fiscal year onward

1. The problems and challenges that the project faced this year and their possible solutions.

2. Particular issues regarding the RIHN support system for project research

Project Members

Project Members

Research Achievement

Books etc

Single work / Joint work

Contributor

Editor / Joint editor

Supervisor

Published Papers

MISC

Presentations

Works

Academic Contribution

Social Contribution

Media Coverage