- 2008/04 - 2012/03 Hirosaki University Graduate School of Science and Technology
- 1996/04 - Hirosaki University
- 1988/04 - 1996/03 Tohoku University
- 1988 - 1996 Tohoku University, Assistant Professor
- 1996 - - Hirosaki University, Professor
- 1981/04 - 1988/03 Tohoku University
- 1981 - 1988 Tohoku University, Research Assistant
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