- 2007 - 2013 Professor, Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University
- 2007 - 2013 群馬大学大学院工学研究科応用化学・生物化学専攻教授
- 2013 - - Gunma University, Faculty of Science and Technology, Division of Molecular Science, Professor
- 2013 - - 群馬大学理工学研究院分子科学部門 教授
- 2003 - 2007 Professor, Department of Nano-Material Systems, Graduate School of Engineering, Gunma University
- 2003 - 2007 群馬大学大学院工学研究科ナノ材料システム工学専攻教授
- 1995 - 2003 Associate Professor, Graduate School of Mathematics, Nagoya University
- 1995 - 2003 Nagoya University Graduate School of Mathematics
- 1998 - 2002 Group Leader, Namba Protonic NanoMachine Project, ERATO, JST
- 1998 - 2002 科学技術振興事業団創造科学技術推進事業難波プロトニックナノマシンプロジェクトグループリーダー
- 1991 - 1995 Research Assistant, Department of Biosciences, Faculty of Engineering, Teikyo University
- 1991 - 1995 Teikyo University Faculty of Science and Engineering, Department of Biosciences
- 1989 - 1991 Researcher, Hotani Molecular Dynamic Assembly Project, ERATO, JRDC
- 1989 - 1991 新技術事業団創造科学技術推進事業宝谷超分子柔構造プロジェクト研究員
- 1988 - 1989 Research Assistant, Medical School, Osaka University
- 1988 - 1989 Osaka University Faculty of Medicine
- 1987 - 1988 Senior Research Fellow at Division of Biology, California Institute of Technology
- 1987 - 1988 米国カリフォルニア工科大学生物学部門上級研究員
- 1984 - 1987 Research Fellow at Division of Biology, California Institute of Technology
- 1984 - 1987 米国カリフォルニア工科大学生物学部門研究員