New Heart Watanabe International Hospital is a medical facility specializing in cardiology and internal medicine, located in Hamadayama, Suginami Ward, Tokyo. The hospital specializes in expert treatment for valvular heart disease, performing minimally invasive keyhole heart surgery using the da Vinci surgical robot system. Keyhole surgery offers smaller incisions, reduced physical burden, and allows patients to walk starting the next day. The hospital employs a one-stop treatment system, requiring only one preoperative visit where the surgery date is determined. According to data from the Japanese Association for Thoracic Surgery, approximately 1 in 29 patients undergoing mitral valve repair in Japan receives keyhole surgery at this hospital. The hospital supports multiple languages including English, and offers convenient services such as credit card and digital payments, parking facilities, and barrier-free accessibility.