It is possible that the strategy that the Hojo clan took to thoroughly resist the conquest effort by the Toyotomi clan brought about the outcome, different from the one for Ieyasu, the Chosokabe clan and the Shimazu clan.
豊臣家に対して徹底抗戦したことが、家康や長宗我部氏、島津氏征伐の時と異なる一線を画す処置を招いたと考えられる。