- 2013 - 現在 The Jikei University School of Medicine President
- 2007 - 2024/03 The Jikei University School of Medicine Department of Molecular Biology Professor and Charperson
- 2001 - 2007 The Jikei University School of Medicine Department of Biochemistry II Professor
- 1996 - 2001 The Jikei University School of Medicine Associate Professor
- 1995 - 1996 The Jikei University School of Medicine Assistant Professor
- 1992 - 1995 University of Utah, Department of Human Genetics and Howard Hughes Medical Institute Associate
- 1989 - 1992 The Jikei University School of Medicine Department of Nutrition Research Associate
- 1987 - 1989 日本学術振興会,特別研究員1989-1992 東京慈恵会医科大学,助手1992-1995 米国ユタ大学ハワードヒューブ医学研究所,アソシエート1995-1996 東京慈恵会医科大学,講師1996-2001 東京慈恵会医科大学,助教授2001- 東京慈恵会医科大学,教授
- 1987 - 1989 Japan Society for the Promotion of Science Fellow
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Japan Society for Medical Education
, The Japanese Society of Polyamine Research
, RNA Society
, Japanese Cancer Association
, The RNA Society of Japan
, The Japanese Biochemical Society
, The Japanese Society of Internal Medicine
, The Molecular Biology Society of Japan