His father, who was to revolt against the bakufu government in the face of death, let him succeed to the family estate in 1333 before he attacked Hidetoki HOJO (Hidetoki AKAHASHI) of Chinzei tandai (office of the military governor of Kyushu).
元弘3年/正慶2年(1333年)、父が鎮西探題・北条英時（赤橋英時）を攻める前、決死の覚悟で幕府に反逆しようとする父から家督を譲られた。