When the legal code was completed, Yasutoki wrote about the aim of Shikimoku as follows in two letters sent to his younger brother, Shigetoki HOJO, who was staying in Kyoto as a member of the Rokuhara-tandai.
完成に当たって泰時は六波羅探題として京都にあった弟の北条重時に送った2通の手紙の中で、式目の目的について次のように書いている。