- 1994 - 2009 Tokyo Kasei Gakuin University
- 1992 - 1994 Chiba University
- 1992 - 1994 Chiba University, Professor
- 1978 - 1991 Chiba University
- 1978 - 1991 Chiba University, Assistant Professor
- 1975 - 1977 Chiba University
- 1975 - 1977 Chiba University, Lecturer
- 1973 - 1974 Chiba University
- 1973 - 1974 Chiba University, Research Assistant
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