- 2023/04 - 現在 Graduate School of Medicine, Intenational University of Health and Welfare Director
- 2019/04 - 現在 Keio University Professor emeritus
- 2019/04 - 現在 School of Medicine, International University of Health and Welfare Department of Immunology Professor
- 2019/04 - 2023/03 International University of Health and Welfare School of Medicine Dean
- 2019/04 - 2021/03 Keio University Division of Cellular Signaling, Institute for Advanced Medical Research, School of Medicine Professor
- 2017/10 - 2019/03 Keio University School of Medicine School of Medicine Vice Dean
- 1997/09 - 2019/03 Keio University School of Medicine Division of Cellular Signaling, Institute for Advanced Medical Research Professor
- 2005/11 - 2019/02 Keio University Institute for Advanced Medical Research Director
- 2017 - 2019 Peking University School of Basic Medical Sciences Guest Professor
- 2015/05 - 2017/09 Keio University Graduate School of Medicine Dean
- 2003/04 - 2005/10 Keio University School of Medicine Institute for Advanced Medical Research Vice Director
- 1992/09 - 1997/08 National Cancer Institute, National Institutes of Health, USA Surgery Branch (Dr. Steven Rosenberg) Visiting Scientist
- 1990/08 - 1992/08 National Cancer Institute, National Institutes of Health, USA Surgery Branch, (Dr. Steven Rosenberg) Visiting Associate
- 1987/08 - 1990/08 National Cancer Institute, National Institutes of Health, USA Surgery Branch, (Dr. Michael Lotze, Dr. Steven Rosenberg) Visiting Fellow
- 1989/04 - 1989/10 California Institute of Technology,USA Department of Biology, (Dr. Leroy Hood) Visiting Researcher
- 1985/10 - 1987/07 University of South Florida, USA Department of Medical Microbiology and Immunology,College of Medicine (Dr.Herman Friedman, Dr. Julie Djeu) Research Associate
- 1984/06 - 1985/09 Keio University School of Medicine Division of Hematology, Rheumatology and Infectious diseases, Department of Medicine Assistant Professor
- 1982/06 - 1984/05 National Okura Hospital Department of Medicine Physician
- 1980/09 - 1982/05 Keio University hospital Department of Medicine Resident
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American Association of Immunologists
, American Association for Cancer Research
, International Society of Biological Therapy of Cancer (iSBTc)
, SITC(Society for Immunotherapy of Cancer)
, Japanese Association of Cancer Immunology
, 日本再生医療学会
, 日本研究皮膚科学会
, Japanese Society of Medicine
, 日本リウマチ学会
, Japanese Society of Hematology
, Japanese Society of Medical Oncology
, Society for Fundamental Cancer Immunology
, Japanese Society of Clinical Immunology
, Japanese Association of Cancer