- 1988 - 2002 Kyushu University
- 1977 - 1987 Kyushu University
- 1977 - 1987 Kyushu University, Associate Professor
- 1971 - 1977 Hiroshima University
- 1971 - 1977 Hiroshima University, Associate Professor
- 1969 - 1971 Nagasaki University
- 1969 - 1971 Nagasaki University, Associate Professor
- 1965 - 1969 Nagasaki University
- 1965 - 1969 Nagasaki University, Assistant Professor
- 1965 - Nagasaki University
- 1965 - Nagasaki University, Research Assistant
- Seinan Jo Gakuin University Faculty of Humanities, Department of Humanities
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