Located in Kawaguchi-cho, Fukuyama City, Hiroshima Prefecture, Oishi Hospital (Medical Corporation Daijinkai) specializes in internal medicine. The hospital offers services in English and Korean, provides parking facilities, and features barrier-free access. Clinic hours are from 9:00 to 13:00 and 15:00 to 18:00, with Sundays and holidays closed. Morning consultations for all departments operate on an appointment basis, but walk-in visits are possible without reservations. Afternoon clinics are by appointment only for diabetes internal medicine. Appointment acceptance hours are Monday through Friday from 9:00 to 18:00. The hospital also handles comprehensive health checkups and general health examinations, and accepts reservations for regional medical cooperation and MRI examinations. Inpatient visitation has resumed, but there are restrictions on the number of visitors and visiting hours.