Shimoji-shima

, (Miyako: "Sïmuzï") is one of the Miyako Islands, a part of the Ryukyu Islands. The island is administered by Miyakojima, Okinawa Prefecture, Japan. The island is connected to Irabu Island via .
Shimoji-shima is included within the Irabu Prefectural Natural Park and is the main setting for the anime series "Stratos 4".
Shimojishima Airport is located on the island.