Next, Yasutoki selected 11 Hyoteishu in total, who were literally the council members, including the representatives of influential gokenin such as Yoshimura MIURA, and the bakufu bureaucracy such as Morokazu NAKAHARA and let them serve in the government office; subsequently, Yasutoki founded the council conference consisting of 13 members, including the 11 members and two regents as the top governmental institution, and this institution handled the determination of policies and personnel affairs, settlement of lawsuits, legislation of laws, etc.
泰時は続いて三浦義村ら有力御家人代表と、中原師員ら幕府事務官僚などからなる合計11人の評定衆を選んで政所に出仕させ、これに執権2人を加えた13人の「評定」会議を新設して幕府の最高機関とし、政策や人事の決定、訴訟の採決、法令の立法などを行った。