- 1984 - 1997 The University of Tokyo College of Arts and Sciences
- 1984 - 1997 (Prof.)Univ. of Tokyo
- 1997 - The Open University of Japan Faculty of Liberal Arts
- 1997 - (Prof.)Univ. of the Air
- 1970 - 1984 The University of Tokyo College of Arts and Sciences
- 1970 - 1984 (Associate Prof.)Univ. of. Tokyo
- 1964 - 1970 Nagoya University School of Science
- 1964 - 1970 (Research Associate)Nagoye Univ.
- 1967 - 1969 米国科学アカデミー,米国航空宇宙局滞在 研究員
- 1967 - 1969 (Research Associate)National Academy of Science-National Aeronautics and Space Administration
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