- 1983 - 1989 Kagoshima University
- 1983 - 1989 Kagoshima University, Associate Professor
- 1989 - - 鹿児島大学 教授
- 1989 - - Kagoshima University, Professor
- 1978 - 1983 Okayama University
- 1978 - 1983 Okayama University, Associate Professor
- 1974 - 1978 Okayama University
- 1974 - 1978 Okayama University, Lecturer
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