Oita Sankai Medical Center, operated by Social Medical Corporation Sankai-kai, is located in Oita City, Oita Prefecture, and provides medical care primarily in internal medicine. Weekday hours are 9:00 AM to 12:30 PM and 2:00 PM to 5:00 PM, with Saturday mornings only. The facility is closed on Sundays and public holidays. English language support is available, and credit cards and electronic payments are accepted. The facility features parking and barrier-free accessibility, creating an environment easily accessible to a wide range of patients. Beyond medical care, the center focuses on improving patient services through patient satisfaction surveys and revised visitation policies, enhancing transparency and comfort. Various health promotion classes are offered, including diabetes education sessions and skincare workshops, supporting preventive care and healthy living. Starting in February 2026, a women's pelvic floor program will be available as self-funded treatment, expanding services to meet community needs. Through these activities, the center serves as a key provider of regional healthcare, contributing through internal medicine care and health support initiatives.