- 1991 - 2004 :東京大学理学部物理学科教授
- 1991 - 2004 :Professor, Department of Physics, University of Tokyo
- 2004 - -:日本大学理工学部教授
- 2004 - -:Professor, Institute of Quantum Science, College of
- 1990 - 1991 :京都大学基礎物理学研究所教授
- 1990 - 1991 :Professor, Yukawa Institute for Theoretical Physics,
- 1983 - 1990 :広島大学理論物理学研究所教授
- 1983 - 1990 :Professor, Research Institute for Theoretical Physics,
- 1976 - 1983 :東京大学原子核研究所助教授
- 1976 - 1983 :Associate Professor, Insitute for Nuclear Study,
- 1973 - 1976 :東京大学原子核研究所助手
- 1973 - 1976 :Assistant, Insitute for Nuclear Study,
- 1972 - 1973 :Research Associate, Cambridge University
- 1972 - 1973 :Research Associate, Cambridge University
- 1970 - 1973 :Research Associate, Enrico Fermi Institute,
- 1970 - 1973 :Research Associate, Enrico Fermi Institute,
- Nihon University Institute of Quantum Science Institute of Quantum Science Professor
- University of Chicag
- Science and Technology, Nihon Universit
- Kyoto University\
- Hiroshima University
- University of Tokyo
- University of Toky
- University of Chicag