- 2017/04 - 2020/03 Nagasaki University
- 2014/04 - 2017/03 Nagasaki University
- 2011/04 - 2017/03 Nagasaki University Graduate School of Fisheries Science and Environmental Studies
- 2002/04 - 2014/03 Nagasaki University Faculty of Environmental Studies
- 1995 - 1997 Nagasaki University
- 1995 - 1997 instructor, Faculty of Liberal Arts, Nagasaki University
- 1991 - 1994 Kyushu University School of Letters
- 1991 - 1994 assistant, Faculty of Literature, Kyushu University
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