During the Jinshin War of 672, Okida took side of Oama no Miko (Prince Oama, who later became Emperor Tenmu), and led the Battle of Seta on July 22 to break through the bridge.
672年の壬申の乱で大海人皇子（天武天皇）の軍に加わり、7月22日の瀬田の戦いで先頭に立って橋を突破した。