- 2019/04 - 現在 School of Sciences, Yokohama City University Department of Life & Environmental Syste Science Professor
- 2016/07 - 現在 Academy of Yokohama City University Comprehensive Marine Sciences Unit Leader
- 2009/04 - 現在 Scientific Advisor, Yokohama Science Frontier High School
- 2009/04 - 現在 Dept Life and Environmental System Sci, Graduate School of NanoBio Sciences, Yokohama City University Professor
- 2018/04 - 2021/03 Deputy of Head, Collage of Arts and Sciences, Yokohama City University
- 2009/04 - 2019/03 Yokohama City University International College of Arts and Sciences Department of Environmental Biosciences. Professor
- 2012/04 - 2016/03 横浜創英大学看護学部 非常勤講師
- 2005/04 - 2012/03 Yokohama City University School of International Arts and Sciences Chairman, Dept of Environmental Bioscience
- 2005/04 - 2009/03 International School of Arts and Sciences, Yokohama City University Associate Professor
- 2006/08 - 2008/07 Ministry of Education, Culture, Sports, Science and Technology, (MEXT) Japan Program Officer (concurrent)
- 1999/04 - 2005/03 Department of System Elements, Graduate School of Integrated Sciences, Yokohama City University Associate Professor
- 1995/06 - 1999/03 Yokohama City University
- 1995/06 - 1998/03 Department of System Elements, Faculty of Science, Yokohama City University Assistant Professor
- 1994/03 - 1995/06 The Biomembrane Institute, Seattle WA, USA (President, Prof. Sen-itiroh Hakomori, Univ. of Washington) Research Fellow
- 1992/04 - 1994/03 Division of Biomedical Polymer Science (Supervised by Prof. Koiti Titani), Institute of Comprehensive Medical Sciences, Fujita Health University Research Fellow