- 2011/10 - Oita University
- 2009/10 - 2011/09 Oita University University Hospital
- 2009/10 - 2011/09 Oita University
- 2009/04 - 2011/09 Oita University Faculty of Medicine
- 2006/04 - 2009/09 Oita University Research Center for Applied Medical Engineering
- 2005/04 - 2007/03 Oita University Faculty of Medicine
- 1996 - 2003 Oita Medical University
- 1996 - 2003 Professor, Department of Surgery I,
- 2003 - - 大分大学医学部外科学第一講座 教授(統合のため名称変更)
- 2003 - - Professor, Department of Surgery I,
- 1993 - 1996 Oita Medical University
- 1993 - 1996 Associate Professor, Department of Surgery I,
- 1992 - 1993 Kyushu University School of Medicine
- 1992 - 1993 Assistant Professor Department of Surgery II,
- 1984 - 1990 Kyushu University School of Medicine
- 1984 - 1990 Assistant Professor Department of Surgery II,
- 1983 - 1984 ケ-プタウン大学(南アフリカ)外科医員
- 1983 - 1984 Senior Consultant Doctor, Department of Surgery,
- (The Integration: Oita University and Oita Medical University)
- Oita University Faculty of Medicine
- Oita Medical University
- School of Medicine, kyusyu University
- University of Cape Town
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日本創傷治癒学会
, アジア消化器内視鏡学会
, 米国外科学会(American College of Surgeons)
, 日本癌治療学会
, 日本腹部救急医学会
, 日本外科系連合学会
, 日本胃癌学会
, 日本臨床外科学会
, 日本肝胆膵外科学会
, 日本内視鏡外科学会
, 日本門脈圧亢進症学会
, 日本消化器内視鏡学会
, 日本消化器外科学会
, 日本消化器病学会
, 日本外科学会
, AETF
, The Japanese Society of Gastroenterological Surgery
, Endoscopic and Laparoscopic Surgeons of Asia
, The Asian-Pacific Society for Pigestive Endoscopy