1975 Graduate from School of Medicine, Hokkaido University. 1975-1977 Medical trainee at Osaka Medical Center for Cancer and Cardiovascular Disease, Osaka, Japan. 1977-1989 Lecturer, Gastroenterology and Hepatology Department, Hokkaido University. 1988-1989, 1991 Research Fellow, Faculty of Life Science (Prof.F.L.Bygrave), Australian National University. 1989-1998 Manager, Gastroenterology section, National Nishi-Sapporo hospital. 1998-Present President, HAMADA Clinic for Hepatology and Gastroenterology.