1997–1998	Resident, Department of Surgery, Tokushima University Hospital, Tokushima, Japan
1998–1999	Medical Staff, Department of Surgery, Takamatsu Municipal Hospital, Takamatsu, Japan
1999–2000	Medical Staff, Department of Surgery, Shikoku Chuo Hospital, Shikoku chuo, Japan
2000–2001	Medical Staff, Department of Surgery, Anan Kyoei Hospital, Anan, Japan
2001–2004	Fellow, Department of Surgery, Tokushima University Hospital, Tokushima, Japan