In order to prevent confusion during the transition of power to the next generation, Yasutoki appointed his uncle, Tokifusa HOJO, as rensho (assistant to the shikken), established the hyojoshu - a consulting institution for making political decisions - and founded the collective leadership system.
泰時は、世代交代期の混乱を防ぐため、叔父の北条時房を執権の補佐役といえる連署に当てるとともに、政治意思決定の合議機関である評定衆を設置し、集団指導体制を布いた。