When the Kamakura bakufu (Japanese feudal government headed by a shogun) had come into power, he was appointed as the first betto (director) of the Mandokoro (Administrative Board), and frequently went back and forth between Kamakura and Kyoto to make and keep the relationship between the Imperial court and the bakufu running smoothly.
鎌倉幕府が成立すると、政所の初代別当となり、朝廷と幕府との関係を円滑に運ぶ為に、鎌倉・京都間を往復した。