- 1986 - 1996 :埼玉大学 教授
- 1986 - 1996 :Saitama University, Professor
- 1996 - -:福岡大学 教授
- 1996 - -:Fukuoka University, Professor
- 1976 - 1986 :埼玉大学 助教授
- 1976 - 1986 :Saitama University, Assistant Professor
- 1975 - 1976 :埼玉大学 講師
- 1975 - 1976 :Saitama University, Lecturer
- 1969 - 1975 :大阪大学 助手
- 1969 - 1975 :Osaka University, Research Assistant
- Fukuoka University Faculty of Science, Department of Applied Mathematics, Faculty of Science Department of Applied Mathematics
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