Located in Hashima City, Oshima Internal Medicine & Endoscopy Clinic is an internal medicine clinic that underwent a change in director and name in June 2024. The clinic specializes in internal medicine and gastroenterology. Director Junji Oshima holds certifications as a specialist from the Japanese Society of Gastroenterology, the Japan Society of Hepatology, and the Japan Gastroenterological Endoscopy Society. Additionally, Vice Director Sadao Oshima, a medical doctor, is also well-versed in respiratory medicine and cardiology. In terms of medical services, the clinic has established a fever clinic and conducts simultaneous antigen tests for COVID-19 and influenza, as well as multiplex PCR testing that can detect 15 pathogens simultaneously. A notable feature is that prescriptions exceeding 28 days can be issued depending on the patient's condition. Facilities include a parking lot and barrier-free accessibility. Online eligibility confirmation using My Number cards is available, and English services are also supported.