- 1993 - 現在 Kitasato University School of Allied Health Sciences
- 1991 - 1993 Kitasato University
- 1983 - 1991 丸文株式会社 分析研究室室長
- 1983 - 1991 Marubun Co-op, Chief of analytical reseach lab.
- 1991 - - Kitasato University, professor
- 1980 - 1983 University of California, San Diego
- 1980 - 1983 University of California, San Diego,
- 1978 - 1980 コロラド鉱山学校 post doctoral fellow
- 1978 - 1980 Colorado School of Mines, Post Doctoral Fellow
- 1977 - 1978 The University of Tokyo Institute for Cosmic Ray Research
- 1977 - 1978 Institute for Cosmic Ray Research, Univ. of Tokyo,
- 1974 - 1976 東京大学原子核研究所 研究生
- 1974 - 1976 Institute for Nuclear Study, Univ. of Tokyo, Research
- Research Assistant
- Research Fellow
- Fellow
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水処理生物学会
, 日本環境化学会
, 環境科学会
, 隕石学会(The Meteoritical Society)
, 日本地球化学会
, 日本分析化学会
, Japan Society for Environmental Chemistry
, The Meteoritical Society
, The Geochemical Society of Japan
, The Japan Society for Analytical Chemistry