He took command of gokenin (immediate vassal of the shogunate in the Kamakura and Muromachi through Edo periods) in Kyoto and engaged in guarding and judging activities in Kyoto as well as performing a liaison function between the Imperial Court and the bakufu.
最初は上洛時に、北条時政が任命され京都の御家人を統率、洛中の警護・裁判を行い、朝廷と幕府の間の連絡の任に当たっていた。