- 2009/04 - 現在 Saitama University Graduate School of Science and Engineering, Graduate School of Science and Engineering, Graduate School of Science and Engineering Professor Emeritus
- 2009/04 - 2010/03 Saitama University
- 2008/04 - 2009/03 Saitama University
- 2006/04 - 2009/03 Saitama University Graduate School of Science, Department of Regulation-Biology
- 2006/04 - 2008/03 Saitama University
- 1990/04 - 2006/03 Saitama University Faculty of Science
- 1988/10 - 1990/04 Saitama University Faculty of Science, Department of Regulation-Biology
- 1982/04 - 1988/09 Hiroshima University Faculty of Science
- 1978/10 - 1982/03 Kagoshima University Faculty of Science
- 1972/04 - 1978/09 東京都立老人総合研究所 生物学部 研究員
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