Usuki Castle, also known as Niyuujima Castle, is a hill top style Japanese Castle on the island of Niyuujima in Usuki Bay Oita Prefecture. Otomo Sorin ordered the construction of Usuki Castle and it was completed in 1562. During the 1560’s Sorin controlled a large part of Kyushu, however he was defeated in the Battle of Mimikawa in 1578, which lead to the capture of Usuki Castle by Shimazu Yoshihiro in 1586. Toyotomi Hideyoshi later gained control of Usuki Castle. Today to Edo period turrets remain, plus there is a reconstructed Daimon turret.