- 1979 - 1993 Tokyo University of Science
- 1979 - 1993 Associate Professor, Faculty of Science,
- 1993 - - 東京理科大学理学部 教授
- 1993 - - Professor, Faculty of Science,Tokyo University
- 1967 - 1979 Tokyo University of Science
- 1967 - 1979 Research Associate, Faculty of Science,
- of Science.
- Tokyo University of Science.
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