In 1346 in the Battle of Shijonawate, he fought against the brothers KO no Moronao and KO no Moroyasu and was defeated, as a result, he committed suicide together with his older brother Masatsura by stabbing each other.
1348年、四條畷の戦いにおいて高師直・高師泰兄弟と戦って敗北し、兄・正行と刺し違えて自害。