- 1993 - 1998 Hirosaki University
- 1993 - 1998 Hirosaki University, Assistant Professor
- 1998 - - 弘前大学 教授
- 1988 - 1993 Hirosaki Gakuin University
- 1988 - 1993 Hirosaki Gakuin College, Assistant Professor
- 1982 - 1988 Hirosaki Gakuin University
- 1982 - 1988 Hirosaki Gakuin College, Lecturer
- 1981 - 1982 Hirosaki Gakuin University
- 1981 - 1982 Hirosaki Gakuin College, Part-time Lecturer
- 1978 - 1981 Tohoku University
- 1978 - 1981 Tohoku University, Research Assistant
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