- 2016 - 現在 Kagoshima Prefectural College
- 2010 - 現在 Kagoshima University
- 2010 - 2016 Kagoshima Prefectural College
- 1988 - 2010 Kagoshima University
- 2003 - 2007 Kagoshima University
- 1978 - 1988 Kagoshima University
- 1978 - 1988 Kagoshima University, Assistant Professor
- 1988 - - Kagoshima University, Professor
- 1977 - 1978 Kagoshima University
- 1977 - 1978 Kagoshima University, Lecturer
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