- 1996 - 1997 Hirosaki University
- 1996 - 1997 Hirosaki University, Professor
- 1997 - - 弘前大学人文学部 教授
- 1997 - - Hirosaki University, Professor
- 1988 - 1996 Hirosaki University
- 1988 - 1996 Hirosaki University, Assistant Professor
- 1986 - 1988 Hirosaki University
- 1986 - 1988 Hirosaki University, Lecturer
- 1980 - 1983 Tohoku University The Faculty of Arts and Letters
- 1980 - 1983 Tohoku University, Research Assistant
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