Oki Islands
In 1570, Terumoto defeated Amago Katsuhisa at the Battle of Nunobeyama. Katsuhisa then fled to the Oki Islands. In 1578, Katsuhisa returned from the Oki Islands and captured Tajima and Inaba Provinces. He then occupied Kozuki Castle for Oda clan under Toyotomi Hideyoshi, and defended it against the Mōri clan. Later, he was attacked by Kobayakawa Takakage and Kikkawa Motoharu, defeated and forced to commit suicide.