- 1998 - 2001 :順天堂大学医学部助教授(免疫学)
- 1998 - 2001 :Associate Professor, Department of Immunology, and Atopy Research Center, Juntendo University School of Medicine, Tokyo
- 2001 - -:日本大学大学院医学研究科教授(分子細胞免疫・アレルギー学)
- 2001 - -:Professor, Division of Molecular Cell Immunology and Allergology, Advanced Medical Research Center, Nihon University Graduate School of Medical Sciences, Tokyo
- 1991 - 1998 :順天堂大学医学部講師(免疫学)
- 1991 - 1998 :Assistant Professor, Department of Immunology, Juntendo University School of Medicine, Tokyo
- 1990 - 1991 :千葉大学医学部助手(免疫学)
- 1990 - 1991 :Assistant , Department of Immunology, Chiba University School of Medicine, Chiba
- 1985 - 1990 :米国国立保健研究所客員助教授
- 1985 - 1990 :Visiting Associate at the Section of Chemical Immunology , (Dr. H. Metzger) NIAMS, NIH, Bethesda MD, U.S.A.
- 1983 - 1985 :千葉大学医学部付属病院医員(内科)
- 1983 - 1985 :Resident in Department of Internal Medicine, Chiba University Hospital, Chiba
- 1981 - 1983 :国保旭中央病院医員(内科)
- 1981 - 1983 :Resident in Department of Internal Medicine, Asahi General Hospital, Chiba
- 1980 - 1981 :千葉大学医学部付属病院医員(内科)
- 1980 - 1981 :Intern in Department of Internal Medicine, Chiba University Hospital, Chiba
- 日本大学 医学部 医学科 教授,センター長