- 1990 - 1994 新潟大学教養部 教授
- 1990 - 1994 Professor : College of General Education, Niigata University
- 1994 - - 新潟大学理学部 教授
- 1994 - - Professor : Faculty of Science, Niigata University
- 1986 - 1990 新潟大学教養部 助教授
- 1986 - 1990 Associate Professor : College of General Education, Niigata University
- 1976 - 1986 Tohoku University Faculty of Science
- 1976 - 1986 Assistant : Faculty of Science, Tohoku University
- 1975 - 1976 Hokkaido University School of Science
- 1975 - 1976 Research Student : Faculty of Science, Hokkaido University
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