- 2000 - 2001 Hijiyama University
- 2000 - 2001 Hijiyama University, Professor
- 1972 - 2000 Hiroshima University
- 1972 - 2000 Hiroshima-University, Lecturer, Assistant
- 1970 - 1972 Kyushu University
- 1970 - 1972 Kyushu University, Research Assistant
- 1962 - 1963 (株)日本リサーチセンター 研究調査部員
- 1962 - 1963 Nihon Research Center, Research staff
- Professor, Professor
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