Takuma Watari, PhD

Contact: watari.takuma(at)


Takuma is a tenure-track researcher at the National Institute for Environmental Studies, 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. His primary research interests include industrial decarbonization, sustainable supply of critical materials, and equity issues in global resource use. His work combines traditional engineering principles with systems analysis, and has been published in leading multidisciplinary scientific journals, including Nature Sustainability, Nature Communications, and Resources Conservation and Recycling. In 2021, he completed his PhD at the University of Tokyo, where his research focused on the global metal cycles in a zero-emissions world. His PhD thesis won the Dean’s Award for its outstanding quality and contribution to the field, making him the first student in the department to complete the PhD program within a two-year timeframe.

Research Areas

Industrial Ecology, Circular Economy, Energy Systems


University of Cambridge
Visiting Research Fellow

University of Technology Sydney
Adjunct Fellow

National Institute for Environmental Studies, Japan
Tenure-Track Researcher

National Institute for Environmental Studies, Japan
Junior Research Associate

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