- 1997 - - 北海道大学大学院医学研究科 教授(消化器外科・一般外科)
- 1994 - 1996 University of Pittsburgh, Department of
- 1987 - 1994 University of Pittsburgh, Department of
- 1985 - 1987 University of Pittsburgh, Department of
- 1984 - 1985 University of Pittsburgh, Department of
- 1980 - - 九州大学医学部第1外科 助手
- Surgery, Pittsburgh, PA, Professor of Surgery
- Surgery, Pittsburgh, PA, Associate Professor
- Professor
- Surgery, Pittsburgh, PA, Visiting Assistant
- Surgery, Pittsburgh, PA, Research Fellow