When the Nagurumi Incident occurred and he was deprived of Nagurumi-jo Castle in Kozuke Province by the lord of Numata-jo Castle, Kuninori INOMATA, who was the vassal of the Hojo clan, he was detained with his mother by the Gohojo clan.
上野国名胡桃城が北条家臣で沼田城主猪俣邦憲に奪われた名胡桃事件の際には、母とともに後北条氏に捕われる。