He wielded power over southern Iyo and moved his castle from Matsuba-jo Castle to Kurose-jo Castle, however in 1556, he was defeated in the battle with Toyotsuna UTSUNOMIYA over a territorial dispute that led to the loss of his son Kintaka.
伊予南部で勢力を誇り、居城を松葉城から黒瀬城に移したが、弘治_(日本)2年（1556年）に宇都宮豊綱と領土をめぐって争い、それによる戦いで実子の公高が討死するという敗北を喫した。