Professor, Graduate School of Public Policy, The University of Tokyo
From 2000 to 2008, he worked as an associate professor at the School of International and Comprehensive Studies, University of Tsukuba. From 2008, he was an associate professor at Hokkaido University's School of Public Policy before being appointed professor in 2011. 2012-2013: visiting fellow at Princeton University's Institute of International and Area Studies; from 2013-2015: member of the UN Security Council Panel of Experts on Iran Sanctions; from 2020: current position. Participated in the Panel of Experts; in his current position since 2020.