- 2023/09 - 現在 Tokyo Institute of Technology School of Science Research Scholar
- 2020/04 - 現在 Yokohama National University Faculty of Engineering Professor Emeritus
- 2003/04 - 2020/03 Professor, Graduate School, Faculty of Enginnering, Yokohama National University
- 2013/04 - 2015/03 Guest Professor, Natinal Institure of Natural Sciences
- 2002/04 - 2003/03 Guest Associate Professor, Institute of Space and Astronautical Science
- 2001/04 - 2003/03 Associate Professor, Graduate School, Faculty of Enginnering, Yokohama National University
- 1991/10 - 2001/03 Associate Professor, Faculty of Enginnering, Yokohama National University
- 1987/10 - 1991/09 Lecturer, Faculty of Enginnering, Yokohama National University
- 1986/04 - 1987/09 JSPS Postdoctoral Fellow
- 1982/09 - 1986/03 Research Associate, University of Maryland, U.S.A.
- 1982/04 - 1982/09 JSPS Postdoctoral Fellow
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日本分析化学会
, Chemical Society of Japan
, American Chemical Society
, ISSOL; The International Astrobiology Society
, Society for the Study of the Origin and Evolution of Life
, 日本宇宙生物科学会
, Geochemical Society of Japan
, The Mass Spectrometry Society of Japan
, Japanese Society for Planetary Sciences
, Committee on Space Research
, Japan Geoscience Union
, Japan Astrobiology Network
, European Astrobiology Network Association