- 1997 - 1998 Akita University
- 1997 - 1998 Akita University, Assistant Professor
- 1998 - - 秋田大学教育文化学部 助教授
- 1998 - - Akita University, Assistant Professor
- 1993 - 1997 Akita University
- 1993 - 1997 Akita University, Assistant
- 1967 - 1993 Akita University
- 1967 - 1993 Akita University, Assistant
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