- 2013/04 - 2024/03 Nihon University Graduate School of Social and Cultural Studies Professor
- 2013/04 - Japan Aerospace Exploration Agency JEM Utilization Center Visiting Researcher
- 2013/04/01 - Japan Aerospace Exploration Agency Space Environment Unilization Center Visiting Researcher
- 2009/06/01 - 2013/03/31 Japan Atomic Energy Agency Oarai Research and Development Center Occupational Health Physician
- 2009/06 - 2013/03 Japan Atomic Energy Agency Oarai Research and Development Center Occupational Health Physician
- 2003/10 - 2009/05 Japan Aerospace Exploration Agency Human Spaceflight Technology Directorate Researcher
- 2003/07 - 2009/05 Kagoshima University Graduate School of Medicine and Dental Sciences Cooperative Dep. Space Environmental Medicine visiting professor
- 1998/02 - 2003/09 National Space Development Agency of Japan Space Utilization Research Center Researcher
- 1993/10 - 1998/01 Japan Space Utilization Promotion Center フロンティア共同研究推進部 Researcher
- 1992/04 - 1993/09 Soka University 生命科学研究所 Research Assistant
- 1985/06/01 - 1987/03/31 Kyushu University Hospital First Internal Medicine (current; Department of Medicine and Biosystemic Science) Resident
- 1985/06 - 1987/03 Kyushu University Hospital First Internal Medicine (current; Department of Medicine and Biosystemic Science) Resident
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