- 1997 - 2002 秋田高専教授
- 1997 - 2002 Akita National College of Technology, Professor
- 1977 - 1997 秋田高専助教授
- 1977 - 1997 Akita National College of Technology, Assistant Professor
- 1972 - 1977 秋田高専講師
- 1972 - 1977 Akita National College of Technolosy, Instructor
- 1971 - 1972 秋田高専助手
- 1971 - 1972 Akita National College of Technology, Research Assistant
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