Yasumori's reforms aimed to reorganize the Gokenin system (immediate vassals of the shogunate in the Kamakura period) overseen by Seitaishogun (commander-in-chief of the expeditionary force against the barbarians, great, unifying leader) in order to expand the Gokenin class and enhance the shogun's authority to prevent any increase in Tokuso's power and Gokenin's intervention into politics, which would influence the position of Yoritsuna and other Tokuso's vassals.
征夷大将軍を戴く御家人制度の立て直しを図る泰盛の改革は御家人層を拡大し、将軍権威の発揚して得宗権力と御内人の幕政への介入を抑制するもので、得宗被官である頼綱らに利害が及ぶものであった。