- 2000 - 2004 Tokyo University of Social Welfare
- 2000 - 2004 Tokyo University of Social Welfare, Professor
- 2004 - - 東日本国際大学 教授
- 2004 - - Higashi Nippon International University, Professor
- 1990 - 1998 Yokohama National University
- 1990 - 1998 Yokohama National University, Professor
- 1982 - 1990 Niigata University
- 1982 - 1990 Niigata University, Professor
- 1977 - 1982 Niigata University
- 1977 - 1982 Niigata University, Assistant Professor
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