- 1980 - 1994 Hiroshima University, Assistant Professor
- 1980 - 1994 Hiroshima University, Assistant Professor
- 1994 - - Hiroshima University, Professor
- 1994 - - Hiroshima University, Professor
- 1979 - 1980 Tokyo University of Science
- 1979 - 1980 Tokyo University of Science, Full-time Lecturer
- 1974 - 1979 Tokyo University of Science
- 1974 - 1979 Tokyo University of Science, Research Assistant
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