- 1981 - 1999 Tokyo Gakugei University
- 1981 - 1999 Tokyo Gakugei University, Professor
- 1972 - 1981 Tokyo Gakugei University
- 1972 - 1981 Tokyo Gakugei University, Assistant Professor
- 1966 - 1972 University of Yamanashi
- 1966 - 1972 Yamanashi University, Assistant Professor
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