- 1986 - 2001 Soka University
- 1986 - 2001 Soka University, Professor
- 1984 - 1986 Niigata University
- 1984 - 1986 Niigata University, Professor
- 1976 - 1984 Soka University
- 1976 - 1984 Soka University, Professor
- 1973 - 1976 Soka University
- 1973 - 1976 Soka University, Associate Professor
- 1971 - 1973 Soka University
- 1971 - 1973 Soka University, Lecturer
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