- 2020/11 - 現在 The University of Tokyo The Faculty of Engineering Professor
- 2020/02 - 現在 The University of Tokyo Graduate School of Frontier Sciences, Department of Advanced Energy Professor
- 2018/04 - 2022/03 Japan Society for the Promotion of Science Research Center for Science Systems Program Officer
- 2017/07 - 2020/01 The University of Tokyo Graduate School of Frontier Sciences Guest Professor
- 2015/04 - 2020/01 National Institute for Fusion Science, National Institutes of Natural Sciences Fellow
- 2004/04 - 2020/01 National Institute for Fusion Science, National Institutes of Natural Sciences Professor
- 2004/04 - 2018/04 Graduate University for Advanced Studies Professor
- 2010/04 - 2016/03 Ministry of Education, Culture, Sports, Science and Technology(MEXT) Science Advisor
- 2006/07 - 2015/03 National Instiute for Fusion Science, National Institutes of Natural Sciences Researach Operation Division Director
- 2009/04 - 2014/05 National Institute for Fusion Science, National Institutes of Natural Sciences Department of Large Helical Device Project Executive Director
- 2004/04 - 2010/03 MEXT Senior Scientific Research Specialist
- 2003/04 - 2005/02 Japan Atomic Energy Agency Primary Guest Researcher
- 2001/04 - 2004/03 Graduate University for Advanced Studies Associate Professor
- 1995/09 - 2004/03 National Institute for Fusion Science Associate Professor
- 2001/04 - 2002/03 Kyoto University Institute of Advanced Energy Guest Associate Professor
- 1989/05 - 1995/08 National Institute for Fusion Science Research Associate
- 1993/03 - 1994/01 Max-Planck-Institute for Plasma Physics MOE Overseas Long-Term Dispatched Researcher
- 1987/04 - 1989/05 Nagoya University Institute of Plasma Physics Research Associate
- 1984/06 - 1985/03 Princeton Plasma Physics Laboratory Guest Researcher
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The Physical Society of Japan
, The Japan Society of Plasma Science and Nuclear Fusion Research
, The American Physical Society
, Atomic Energy Society of Japan