Takuma Watari, PhD
Contact: watari.takuma(at)


Takuma is a tenure-track researcher at the National Institute for Environmental Studies (NIES), Japan, and an adjunct fellow at the University of Technology Sydney, Australia. He is currently a visiting research fellow at the University of Cambridge, United Kingdom. He received his PhD from the University of Tokyo in 2021, focusing on the global metal cycles in a zero-emission world. His PhD thesis won the Dean’s Award and he was the first in his department to earn the right to complete the PhD program in two years. He is currently leading several research projects funded by the Japan Society for the Promotion of Science and is a core researcher in the “Material Flow Innovation Research Program,” a five-year research project underway in the Material Cycles Division of the NIES.

Research Areas

Industrial Ecology, Circular Economy, Energy Systems


Visiting Research Fellow

University of Cambridge, United Kingdom

Adjunct Fellow

University of Technology Sydney, Australia

Tenure-Track Researcher

National Institute for Environmental Studies, Japan

Junior Research Associate

National Institute for Environmental Studies, Japan

External Links



Dean’s Award (University of Tokyo, 2022)

Japan Business Federation Global Scholarship (Japan Business Federation, 2018)

1st Place of Yamaoka Award (Yamaoka Memorial Foundation, 2018)

Best Presentation Award for Students (Japan Society of Energy and Resources, 2018)