- 1985 - 1988 Hokkaido Tokai University
- 1985 - 1988 Hokkaido Tokai University, Professor
- 1988 - - 千葉経済大学 教授
- 1988 - - Chiba Keizai University, Professor
- 1980 - 1985 Hokkaido Tokai University
- 1980 - 1985 Hokkaido Tokai University, Assistant
- 1977 - 1980 Hokkaido Tokai University
- 1977 - 1980 Hokkaido Tokai University, lecturer
- 1976 - 1977 Tokai University
- 1976 - 1977 Tokai University craft Junior College,
- Professor
- lecturer
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