- 1993 - 2002 Soka University
- 1993 - 2002 Soka University, Associate Professor
- 2002 - Soka University
- 2002 - Soka University, Professor
- 1991 - 1993 Soka University
- 1991 - 1993 Soka University, Assistant Professor
- 1990 - 1991 Soka University Institute of Life Science
- 1990 - 1991 Soka University, Lecturer
- 1980 - 1991 Kitasato University
- 1980 - 1991 Kitasato University, Research Associate
- 1990 - Ochanomizu University
- 1990 - Graduate School of Ochanomizu University,
- 1989 - - 北里大学医学部 非常勤講師
- 1989 - - Kitasato University, Part-time Instructor
- 1985 - - (有)ディー・エヌ・エー研究所 研究員
- 1985 - - DNA Research Institute, Researcher
- 1978 - 1980 米国・Yale大学医学部薬理学科 博士研究員
- 1978 - 1980 Yale University, Postdoctoral Associate
- 1968 - 1978 慶応義塾大学医学部 助手
- 1968 - 1978 Keio University, Research Assistant
- 1975 - 1977 ,1980-1989 北里大学衛生学部 非常勤講師
- 1975 - 1977 ,1980-1989 Kitasato University, Part-time Teacher
- 1966 - 1967 Tokyo Medical and Dental University Faculty of Dentistry
- 1966 - 1967 Tokyo Medical and Dental University,
- 1966 - Kitasato University
- 1966 - Kitasato University, Junior Research Assistant
- Part-time teacher
- Research Assistant
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日本Archaea研究会
, (社)日本油化学会
, American Oil Chemists' Society
, 日本分子生物学会
, The International Society for Extremophiles
, American Oil Chemists' Society
, Japan Oil Chemists' Society
, The Molecular Biology Society of Japan
, Japan Society for Archaea
, The International Society for Extremophiles