He has been a specialist of diabetes mellitus for 20 years and simultaneously worked as a specialist of medical informatics for 10 years. He is a councilor member of Japanese Society of Diabetes Mellitus and the director of the scientific committee of Japan Association for Medical Informatics. He focuses on the disease management methodology to prevent chronic diseases as diabetes mellitus and complications. He has organized the “Carna project” which aims to establish a Japanese model for disease management of diabetes mellitus from primary to tertiary prevention as a social system.