Ōshima stable (大島部屋, Ōshima-beya), formerly known as Tomozuna stable (友綱部屋, Tomozuna-beya), is a stable of sumo wrestlers, part of the Isegahama ichimon or group of stables. As of January 2022, it has 11 wrestlers. The current version of the stable was established in January 1961 by former komusubi . Upon reaching the age of 65 in 1976 he turned the stable over to the former jūryō wrestler Yamatonishiki. In 1989 former sekiwake Kaiki became the stablemaster upon Yamatonishiki's retirement, and eventually produced ōzeki Kaiō.