Hagishi Kokumin Kenko Hoken Mishima Clinic is the only medical institution on Mishima, a remote island located approximately 45 kilometers northwest of the Hagi mainland in the Sea of Japan, Yamaguchi Prefecture. On this aging island with a population of 574 and an elderly population rate of approximately 60%, the clinic serves as the sole provider of everyday medical care for local residents. Centered on internal medicine, it is equipped with comprehensive medical devices including X-ray imaging equipment, ultrasound diagnostic devices, and electronic endoscopes, enabling a certain level of examination and diagnosis despite its remote island location. The RC-structure facility built in 2009 is barrier-free, providing an environment where elderly patients can receive care with peace of mind. Consultations are available on weekdays from 8:30 a.m. to 5:15 p.m., with a midday break, operating year-round. The availability of English-language service is another notable feature of the clinic, making it a reliable medical resource for travelers visiting the island. On this island connected to the mainland by regular ferry service, the clinic plays a vital role in supporting local healthcare.