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• Net-zero embodied carbon in buildings is achievable with technologies available today

  Research paper:
  T. Watari et al. (2024), Net-zero embodied carbon in buildings with today’s available technologies, Environmental Science & Technology, 58, 4, 1793-1801

• Ultra-high resource efficiency and circularity in society is another pathway to carbon neutrality.

  Research paper:
  Hata et al. (2025), Material Efficiency and Circularity Goals to Achieve a Carbon-Neutral Society by 2050, Environmental Science & Technology, 59, 6025-6036

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• Impact of flood events on plastic mobilisation

  Research paper:
  Nakayama (2025) Impact of settling and resuspension on plastic dynamics during extreme flow and their seasonality in global major rivers, Hydrological Processes, 30, e70072.

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• Quantifying trade-off of waste plastic between export and import

  Research paper:
  Nakayama and Osako (2024), Plastic trade-off: Impact of export and import of waste plastic on plastic dynamics in Asian region, Ecological Modelling, 489, 110624.

• Flux and fate of plastic in terrestrial–aquatic–estuarine continuum

  Research paper:
  Nakayama (2024) Evaluation of flux and fate of plastic in terrestrial-aquatic-estuarine continuum by using an advanced process-based model, Ecohydrology, 17(6), e2678.

• Voluntarily committed actions using the carbon footprint calculator were insufficient to meet the 2030 personal carbon footprint target, even among the most progressive user groups

  Research paper:
  Koide et al. (2025) Who is self-committed to climate action? Exploring decarbonisation actions and target gaps using carbon footprint calculator data in Japan. Energy Research & Social Science, 120, 103930.

• Impact of global reservoirs and lakes on riverine plastic transport and burial

  Research paper:
  Nakayama (2024) Impact of global major reservoirs and lakes on plastic dynamics by using a process-based eco-hydrology model, Lakes & Reservoirs: Science, Policy and Management for Sustainable Use, 29, e12463.

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• Regulations against long-chain PFAS have caused increased use of durable water repellents containing short-chain PFAS.

  Research paper:
  Matsukami et al. (2024), Impact of tightening environmental regulations against long-chain perfluoroalkyl acids on composition of durable water repellents containing side-chain fluorinated polymers, Science of the Total Environment, 940, 173708.