In 1333, when his father, Norimura, raised an army to destroy the Kamakura bakufu (Japanese feudal government headed by a shogun), he supported his father and distinguished himself in a battle in Kyoto.
1333年、父の則村が鎌倉幕府討幕のために挙兵したとき、これに従って京都での戦いで武功を挙げた。