- 2017/11 - 現在 Nihon University
- 2016/04 - 現在 Nihon University
- 2004/04 - 現在 Nihon University School of Medicine School of Medicine
- 2015/04 - 2024/09 Nihon University College of Engineering
- 2005/04 - 2018/03 The University of Tokyo Institute of Molecular and Cellular Biosciences
- 2013/04 - 2016/03 日本大学 医学部図書館 館長
- 2007/04 - 2013/03 日本大学 医学部図書館 副館長
- 2008/04 - 2009/03 Rikkyo University College of Science
- 2006/04 - 2007/03 Shimane University Faculty of Medicine
- 2004/04 - 2007/03 広島大学歯学部 非常勤講師
- 2003/04 - 2004/03 Tokyo Medical and Dental University
- 2002/04 - 2004/03 Osaka University
- 1998/03 - 2002/03 Associate, Howard Hughes Medical Institute and University of Texas Southwestern Medical Center Associate
- 1996/04 - 1998/03 Chief-in-Physician, Saitama Comprehensive Mental Health Center
- 1993/08 - 1996/03 Staff Physician, Saitama Comprehensive Mental Health Center
- 1991/08 - 1993/07 Fellow, Department of Internal Medicine III, National Defence Medical College
- 1989/06 - 1991/07 Physician, Ground Self Defence Force Omiya Station
- 1987/06 - 1989/05 Resident, National Defense Medical College Hospital and Self Defense Force Central Hospital
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日本東洋医学会
, 日本免疫学会
, 胆汁酸研究会
, 日本ビタミン学会
, 日本内分泌学会
, The Endocrine Society
, American Society of Microbiology
, 脂溶性ビタミン総合研究委員会
, The American Society for Biochemistry and Molecular Biology
, The Japanese Biochemical Society
, 日本レチノイド研究会
, The Molecular Biology Society of Japan
, The Japanese Pharmacological Society
, The Japanese Society of Hematology
, The Japanese Cancer Association
, The Japanese Society of Internal Medicine