Professor and Chairman Department of Hepatobiliary and Pancreatic Surgery, Tokyo Medical and Dental University. Director member of Japanese Society of Hepato-Biliary-Pancreatic Surgery and Japan Society for Endoscopic Surgery, and Advisory Board Member of International Laparoscopic Liver Society. He will be a Congress Chairman of the 20th Annual Meeting of the Japanese Society of Gastroenterological Surgery to be held in 2022, and the 35th Meeting of Japanese Society of Hepato-Biliary-Pancreatic Surgery to be held in 2023.