- 2009/04 - Dep.Aerospace Engineering,Fac.Science and Technology,Teikyo Univ. Professor
- 2003/10 - 2009/03 Japan Aerospace Exploration Agency Instiyute of Space and Astronautical Science Professor
- 1995/10 - 2003/09 宇宙科学研究所 教授
- 1998 - 2003 Tokyo Institute of Technology School of Engineering
- 1998 - 2003 Part-time Lecturer,Fac.Eng.,Tokyo Institute of
- 1995 - 2003 Professor,The Institute of Space and
- 2003 - - Professor,The Institute of Space and
- 1990/09 - 1995/09 Sojo University Faculty of Engineering, Department of Aerospace Systems Engineering
- 1990 - 1995 Associate Professor,The Institute of Space and
- 1977 - 1993 Chiba University Faculty of Engineering
- 1977 - 1993 Part-time Lecturer,Fac.Eng.,Chiba University
- 1974/05 - 1982/01 東京大学宇宙航空研究所 助手
- 1974 - 1982 Research Associate,The Institute of Space and
- 宇宙科学研究本部 教授
- Technology
- Exploration Agency
- Astronautical Science,Japan Aerospace
- Astronautical Science,Min.Education
- Astronautical Science,The Univ.of Tokyo
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International Academy of Astronautics
, AIAA(American Institute of Aeronautics and Astronautics)
, 日本ロケット協会
, 日本航空宇宙学会
, American Institute of Aeronautics and Astronautics
, The Japan Society for Aeronautics and Space Sciences
, Japanese Rocket Society