- 1994 - 1999 Kanto Gakuen University Kanto Gakuen University
- 1994 - 1999 Kanto gakuen University, Professor
- 1990 - 1994 Soka University Faculty of Economics
- 1990 - 1994 Soka University, Professor
- 1960 - 1990 Keio University Faculty of Economics
- 1960 - 1990 Keio University, Professor
- 1952 - 1960 Keio University Faculty of Economics
- 1952 - 1960 Keio University, Assistant Professor
- 1947 - 1952 Keio University Faculty of Economics
- 1947 - 1952 Keio University, Research Assistant
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