- 1987 - 2000 University of Toyama
- 1987 - 2000 Toyama University, Assistant Professor
- 2000 - - 富山大学 教授
- 2000 - - Toyama University, Professor
- 1985 - 1987 Shimane University
- 1985 - 1987 Shimane University, Assistant Professor
- 1982 - 1985 Shimane University
- 1982 - 1985 Shimane University, Instructor
- 1979 - 1982 Tohoku University
- 1979 - 1982 Tohoku University, Research Assistant
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