- 1988 - 2001 Soka University Faculty of Business Administration
- 1988 - 2001 Soka University, Dept. of Business Admin Professor
- 1976 - 1988 Soka University Faculty of Business Administration
- 1976 - 1988 Soka University, Dept. of Business Admin, Associate Professor
- 1969 - 1976 Senshu University School of Business Administration
- 1969 - 1976 Senshu University, Dept. of Business Admin, Full-time Lecturer
- 1968 - 1969 Senshu University School of Business Administration
- 1968 - 1969 Senshu University, Dept. of Business Admin, Research Assistant
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