- 2003 - 2006 Nagasaki University School of Medicine
- 2003 - 2006 Research Associate,University Hospital Attached to the School of Medicine ,Nagasaki University
- 2006 - Nagasaki University Center for Health and Community Medicine
- 2006 - Nagasaki University School of Medicine
- 2006 - Nagasaki University School of Dentistry
- 2006 - Nagasaki University Center for Health and Community Medicine
- 2006 - Associate Professor,Center for Health and Community and Medicine,Nagasaki University
- 2006 - Lecturer,University Hospital of Medicine and Dentistry,Nagasaki University
- 2006 - Lecturer,School of Dentistry,Nagasaki University
- 2006 - Lecturer,Center for Health and Community and Medicine,Nagasaki University
- 2004 - 2005 Nagasaki University School of Medicine
- 2004 - 2005 Lecturer,School of Medicine,Nagasaki University
- 2003 - 2004 Nagasaki University
- 2003 - 2004 Nagasaki University School of Medicine
- 2003 - 2004 Lecturer,Nagasaki University
- 2003 - 2004 Lecturer,School of Medicine,Nagasaki University
- 1989 - 2003 米国カリフォルニア大学ロサンゼルス校シダースサイナイメディカルセンター 客員助教授
- 1989 - 2003 Visiting Associate Professor,UCLA Cedars-Sinai Medical Center
- 2003 - Nagasaki University School of Medicine
- 2003 - Research Associate,University Hospital Attached to the School of Medicine ,Nagasaki University
- 1994 - 2002 長崎刑務所医務部保健課 職員(医療系)
- 1994 - 2002 Medical Staff
- 2002 - Nagasaki University School of Medicine
- 2002 - Research Associate,School of Medicine,Nagasaki University
- 1993 - 1994 和光会恵寿病院 職員(医療系)
- 1993 - 1994 Medical Staff
- 1988 - 国立対馬病院 職員(医療系)
- 1988 - Medical Staff
- 1987 - 小城町立病院 職員(医療系)
- 1987 - Medical Staff
- 1986 - 光晴会病院 職員(医療系)
- 1986 - Medical Staff