Keisuke Nansai is Director of Material Cycles Division, National Institute for Environmental Studies (NIES), Japan. His expertise includes environmental input-output analysis.

Keisuke Nansai is Director of Material Cycles Division, National Institute for Environmental Studies (NIES), Japan. His expertise includes environmental input-output analysis.Keisuke Nansai is Director of Material Cycles Division, National Institute for Environmental Studies (NIES), Japan. He is an adjunct professor at the Graduate School of Environmental Studies at Nagoya University in Japan. He is a council member of the Institute of Life Cycle Assessment, Japan.

He is serving as an editor of an academic journal, Resources, Conservation & Recycling. He is also an editorial board member both of Economic Systems Research and Environmental Research: Infrastructure and Sustainability. He has been specializing in environmental systems analyses based on life cycle thinking, and applying an input-output analysis, life-cycle analysis, material flow analysis and network analysis to environmental and social assessments of technologies, human lifestyle, and policies. He is a developer of 3EID, the Japanese environmental input-output database that has been widely used for carbon footprint analysis in Japan.

His present research interests include the nexus of planetary health and resource productivity, resource criticality of technologies for climate change mitigation/adaptation, and future global material flow harmonized with the planetary health.

Selected publications

Ryu Koide, Haruhisa Yamamoto, Keisuke Nansai & Shinsuke Murakami (2023) Agent-based model for assessment of multiple circular economy strategies: Quantifying product-service diffusion, circularity, and sustainability, Resources, Conservation & Recycling, 199, 107216.

Minami Kito, Hirotaka Takayabu & Keisuke Nansai (2023) Carbon-neutral pathways to 2050 for Japan's aviation industry in the absence of a mass supply of sustainable aviation fuels, Journal of Industrial Ecology 27(6):1-14.

Sho Hata, Keisuke Nansai & Kenichi Nakajima (2023) Supply Chain Factors Contributing to Improved Material Flow Indicators but Increased Carbon Footprint, Environmental Science & Technology, 57 (34), 12713-12721.

Takuma Watari, Sho Hata, Kenichi Nakajima & Keisuke Nansai (2023) Limited quantity and quality of steel supply in a zero-emission future, Nature Sustainability, 6(3):1-8.

Yingchao Cheng, Kenichi Nakajima, Keisuke Nansai, Jacopo Seccatore, Marcello M. Veiga & Masaki Takaoka (2022) Examining the inconsistency of mercury flow in post-Minamata Convention global trade concerning artisanal and small-scale gold mining activity, Resources Conservation and Recycling, 185(4):106461

Takuma Watari, Zhi Cao, Sho Hata & Keisuke Nansai (2022) Efficient use of cement and concrete to reduce reliance on supply-side technologies for net-zero emissions, Nature Communications, 13(1):4158.

Sho Hata, Keisuke Nansai, Kenichi Nakajima (2022) Fixed-capital formation for services in Japan incurs substantial carbon-intensive material consumption, Resources Conservation and Recycling, 182:106334

Takuma Watari, Stephen Northey, Damien Giurco, Sho Hata, Ryosuke Yokoi, Keisuke Nansai & Kenichi Nakajima (2022) Global copper cycles and greenhouse gas emissions in a 1.5 °C world, Resources Conservation and Recycling, 179:106118

Taku Kadoya, Yayoi Takeuchi, Yushin Shinoda & Keisuke Nansai (2022) Shifting agriculture is the dominant driver of forest disturbance in threatened forest species’ ranges, Communications Earth & Environment, 3(1), 108.

Keisuke Nansai, Susumu Tohno, Satoru Chatani, Keiichiro Kanemoto, Shigemi Kagawa, Yasushi Kondo, Wataru Takayanagi & Manfred Lenzen, Consumption in the G20 nations causes particulate air pollution resulting in two million premature deaths annually, Nature Communications, 12, 6286

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