Yasutoki called his uncle Tokifusa back from Kyoto and put him at the position of regent similar to himself, and thereby established a system with a plurality of regents, called double-regent system, with those next to the regents later called Rensho.
叔父時房を京都から呼び戻し、泰時と並ぶ執権の地位に迎え「両執権」と呼ばれる複数執権体制をとり、次位のものはのちに「連署」と呼ばれるようになる。