Hasegawa Hospital of Sekishinkai Medical Corporation, located in the residential area of Osawa, Mitaka City, Tokyo, specializes in internal medicine. Since September 1, 2020, the hospital's website has been integrated with Aoi-kai Hasegawa Hospital, providing information through the same site. Medical departments are limited to internal medicine only, and the hospital is closed on Sundays, holidays, the first three days of January, May consecutive holidays, and year-end and New Year holidays. The hospital provides English services, accommodating patients who speak foreign languages. Payment options include both credit cards and electronic payments, allowing patients to receive treatment even without cash. Parking is available, making it possible to visit by car.