In August 1284, Sadatoki HOJO, the 14-year-old heir of the family, became the 9th regent while the Hojo clan was making a threatening move in association with TAIRA no Yoritsuna.
14歳の嫡子北条貞時は北条一門が平頼綱と連動して不穏な動きを見せる中、7月に9代執権に就任した。