Born in 1947. Graduated from Gunma University School of Medicine in 1973. Medical staff of the Coloproctology Center, Social Insurance Central Hospital (1978 - ) Medical director of the Coloproctology Center, Social Insurance Central Hospital (1987 - ) Chief medical officer of the Coloproctology Center, Social Insurance Central Hospital (1990 - ) Vice director of Social Insurance Central Hospital (1996 - ) Director of the center of the Coloproctology Center, Social Insurance Central Hospital (1998 - ) Established Iwadare Junichi Clinic in Ginza, Tokyo in June 2006, aiming to realize ideal anal examination and treatment. Wrote many books, and covered by the media such as “NHK Health Home Page”.

Auditor/councilor of the Japan Society of Coloproctology Representative Coordinator of the Internal Hemorrhoid Therapy Study Group Representative Coordinator of the Japanese Association for Clinical Proctology DDW-Japan 1999 Chairman of the Japan Society of Coloproctology, and Chairman of the 60th General Assembly of the Japan Society of Coloproctology. Instructor/Specialist of the Japan Society of Coloproctology. Doctor of Medicine.