Koga Hospital 21 is located in Miyanojin, Kurume City, Fukuoka Prefecture, and serves as a core comprehensive hospital in the region as a member of the Social Medical Corporation Tenjinkai Koga Hospital Group. Built on a foundation of internal medicine, the hospital offers a wide range of internal medicine specialties including diabetology and endocrinology, neurology, pulmonology, cardiology, gastroenterology, and nephrology, along with a full spectrum of departments such as surgery, neurosurgery, gastrointestinal surgery, orthopedic surgery, otolaryngology, dermatology, urology, rheumatology, rehabilitation medicine, palliative care medicine, emergency medicine, anesthesiology, and diagnostic and therapeutic radiology. The Koga Hospital Group, of which this hospital is a part, operates multiple hospitals and clinics centered in Kurume City, and has built a longstanding reputation for excellence and trust in regional healthcare. English-language services are available, making the facility accessible to patients from diverse backgrounds, and comprehensive barrier-free infrastructure ensures that patients with physical disabilities can visit with confidence. A variety of cashless payment options are accepted, including credit cards, debit cards, and electronic payment methods. On-site parking is provided for patients arriving by private vehicle. The hospital is generally closed on Sundays, public holidays, and during the year-end and New Year period, and continues to serve as a comprehensive medical institution supporting the healthcare needs of Kurume City and the surrounding area, from routine medical care to advanced specialized treatment.