[1][2] In 1973 he began his career with the Ministry of Economy, Trade and Industry of Japan (METI).

In 1998–2000 he was posted at the Embassy of Japan in Washington, D.C., as Minister for Energy, Trade and Industry.

[1] On 1 September 2011, he was succeeded in this role by the Former Minister of Economic Affairs of the Netherlands, Maria van der Hoeven.

On May 28, 2014 he hosted the Global Leader Program for Social Design and Management (GSDM) 15th Platform Seminar, The 79th Public Policy Seminar at the University of Tokyo (title: "Peaceful and Safer Use of Nuclear Power: Role of Integral Fast Reactor").

[14] His research paper on the role of the Integral Fast Reactor was published in January 2017.