Dr. Ban received his Medical degree from the Showa University School of Medicine, Tokyo, Japan. He trained in internal medicine and in endocrinology at Showa University Hospital, Japan. Dr. Ban stayed in Showa University after his training, joining the Department of Medicine, the Showa University Karasuyama Hospital, in 2004. Dr. Ban joined Showa University School of Medicine in April of 2008 as Assistant Professor of Medicine. Dr. Ban serves on the Editorial Boards of Case Reports in Genetics, Journal of Diabetes and Metabolic Syndrome Disorders, Journal of Diabetes and Clinical Endocrinology, Annals of Thyroid Research, and Frontiers in Endocrinology. He is a Fellow of the Japanese Society of Internal Medicine, the Japan Diabetes Society, and the Japan Thyroid Association, as well as the Japan Endocrine Society.