Mar.1982 Bach. of Agric. (Agric. Econ.) from Tokyo University
Feb. 1995 Doctor of Agric.(Agric. Econ.) from Tokyo University
Apr.1982 International Planning Division,Ministry of Agriculture
Apr. 1988 National Research Institute of Agricultural Economics(NRIAE), Ministry of Agriculture
Oct. 1993 Senior Researcher, NRIAE
Oct. 1996- Mar. 1998 Director, Research Coordination Division, NRIAE
Apr.1998- Mar.2004 Associate Professor, Kyushu University
Apr.2004- Aug.2006 Professor, Kyushu University
Sep.2006 - Present Professor, The University of Tokyo
1998- 2003 (July-August)Visiting Associate Professor, Cornell University
2004- 2005 (July-August) Visiting Professor, Cornell University
2007 (August)Visiting Professor, Cornell University
Honored with the best article prize of the Japanese Journal of Agricultural Economics, 1995.
Honored with the best book prize of the Japanese Journal of Agricultural Economics, 2003.