Kazuhiko Otsuka

Director, Japan Oceans


Areas of expertise:
Fisheries management, sustainable innovation

Kazu is a practical solution builder of sustainable fisheries that align conservation with the business of fishing.

As the Japan lead, Kazu is responsible for conducting collaborative research, growing diverse partnerships and building technical capacity to bring lasting stability to fisheries resources in Japan.

He holds a visiting professor appointment at Department of Food Production and Environmental Management, Faculty of Agriculture of Iwate University.


Over the career, Kazu’s core strength is to manage complex challenges and deliver integrated solutions. Prior to joining EDF, he worked at a leading strategic consulting firm, Boston Consulting Group, specializing in partnership coalition, corporate transformation, and business development.


Kazu received Ph.D. in Geology and Geophysics at Yale University and B.S. in Geology and Mineralogy at Kyoto University. He was awarded William E. Ford Memorial Fellow at Yale University and Outstanding Student Paper Award of the American Geophysical Union.


Tokunaga K., Ishimura G., Otsuka K., Abe K., Kleisner K., Fujita R., Iwata S., 2019. Alternative outcomes under different fisheries management policies: A bioeconomic analysis of Japanese fisheries, under review.

Otsuka K. and Karato S. 2015. The influence of ferric iron and hydrogen on Fe–Mg interdiffusion in ferropericlase ((Mg,Fe)O) in the lower mantle, Physics and Chemistry of Minerals, 42(4), 261-273 https://link.springer.com/article/10.1007/s00269-014-0717-6.

Otsuka, K., Longo, M., McCammon, C. and Karato, S., 2013. Ferric iron content of ferropericlase as a function of composition, oxygen fugacity, temperature and pressure: Implications for the redox conditions during diamond formation in the lower mantle, Earth and Planetary Science Letters, 365: 7-16 https://www.sciencedirect.com/science/article/pii/S0012821X12006486.

Otsuka, K. and Karato, S., 2012. Deep penetration of molten iron into the mantle caused by the morphological instability, Nature, 492: 243-247 https://www.nature.com/articles/nature11663.

Otsuka, K. and Karato, S., 2011. Control of water fugacity under high pressure and temperature, Physics of the Earth Planetary Interiors, 189: 27-33 https://www.sciencedirect.com/science/article/pii/S0031920111001890.

Otsuka, K., McCammon, C.A. and Karato, S., 2010. Tetrahedral site occupation of ferric iron in (Mg,Fe)O: Implications for the transport properties of the lower mantle, Physics of the Earth Planetary Interiors, 180: 179-188 https://www.sciencedirect.com/science/article/pii/S0031920109002155.