- 1990 - 1998 Rikkyo University Department of Physics, College of Science
- 1990 - 1998 Associate Professor,Department of Physics,College of Science,RIKKYO UNIVERSITY
- 1998 - - 立教大学理学部物理学科 教授
- 1998 - - Professor,Department of Physics,College of Science,RIKKYO UNIVERSITY
- 1988 - 1990 Rikkyo University Department of Physics, College of Science
- 1988 - 1990 Lecturer,Department of Physics,College of Science,RIKKYO UNIVERSITY
- 1986 - 1988 NASA Marshall Space Flight Center 研究員
- 1986 - 1988 Researcher
- 1984 - 1986 Univ.of Illinois, Dept.of Physics 研究員
- 1984 - 1986 Researcher
- 1983 - 1984 Univ.of Washington, Astronomy Dept 研究員
- 1983 - 1984 Researcher
- 1977 - 1978 日本学術振興会(東京大学宇宙航空研究所) 奨励研究員
- Rikkyo University College of Science, Department of Physics Professor
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