- 2010/01 - 日本学士院会員
- 1998/04 - 2008/03 Tokyo Keizai University
- 1998 - 2004 Tokyo Keizai University, Professor
- 1981/01 - 1998/03 The University of Tokyo
- 1981 - 1998 University of Tokyo, Professor
- 1968/01 - 1980/12 The University of Tokyo
- 1968 - 1980 University of Tokyo, Associate Professor
- 1965/07 - 1967/12 The University of Tokyo
- 1965 - 1967 University of Tokyo, Research Assistant
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