- 1996 - 2000 Tohoku University
- 1996 - 2000 Tohoku University, Assistant Prof.
- 2000 - - 東京大学助教授
- 2000 - - University of Tokyo, Assistant Prof.
- 1990 - 1996 Hokkaido University
- 1990 - 1996 Hokkaido University, Assistant Prof.
- 1989 - 1990 Senshu University
- 1989 - 1990 Senshu University, Lecturer
- 1987 - 1989 日本学術振興会特別研究員
- 1986 - 1988 Atomi University
- 1986 - 1988 Atomi-gakuen Womens University, Lecturer
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