Okushiri Town National Health Insurance Hospital, located in Okushiri Town, Okushiri District, Hokkaido, is a public hospital serving as the core medical hub on Okushiri Island in the Sea of Japan, providing internal medicine services. Despite the geographical challenges of being a remote island, the hospital plays a vital role in meeting the everyday medical needs of local residents and functions as a pillar supporting the island's healthcare system. Medical consultations are conducted primarily on weekdays, and the facility is closed on Saturdays, Sundays, public holidays, and the year-end and New Year period (December 31 to January 5), so patients are advised to confirm the schedule in advance when planning a visit. In terms of facilities, the hospital offers a parking lot and is designed to be barrier-free, creating an accessible environment for wheelchair users and those with mobility concerns. English-language support is also available, allowing the hospital to accommodate patients who require communication in English. For public transportation, a bus stop named "Okushiri Town Kokuho Byoin-mae" is located near the facility, making the hospital accessible via the island's public transit system. As an indispensable presence in a remote island environment with limited medical resources, the hospital continues to provide internal medicine-centered healthcare services and plays an essential role in sustaining local medical care.