- 1991 - 2004 The University of Tokyo Earthquake Research Institute
- 1991 - 2004 Earthquake Research Institute, University of
- 1986 - 1991 The University of Tokyo Earthquake Research Institute
- 1986 - 1991 Earthquake Research Institute, University of
- 1973 - 1986 The University of Tokyo Faculty of Science
- 1973 - 1986 Faculty of Science, University of Tokyo,
- 1972 - 1973 フランス, パリ第六大学地球物理学研究所 助教授
- 1972 - 1973 Geophysical Institute, University of Paris 6,
- 1971 - 1972 ドイツ, マックス・プランク核物理研究所 客員研究員
- 1971 - 1972 Max-Planck Institute(Germany)Guest researcher
- 1972 - - フランス, 国立中央科学研究所 研究員
- 1972 - - National Science Research Center(CNRS),(France)
- 1970 - 1971 日本学術振興会 奨励研究員
- 1970 - 1971 JSPS Postdoctoral fellow
- Tokyo, Professor
- Tokyo, Associate Professor
- Research Associate
- (France)Associate Professor
- Researcher
- for Nuclear physics
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