In starting the bakufu, he established laws and regulations to control samurai and the Imperial court, through the introduction of various systems, including the specifications of Buke shohatto (laws for the military families) and of Kinchu narabini kuge shohatto (a set of regulations that were applied to the emperor and the Kyoto nobles).
幕府開府に当たって武家諸法度や禁中並公家諸法度の制定、各制度の整備を行い、武家の統制及び朝廷の掌握に向けた法度を定めた。