Tsunefusa had a close connection with MINAMOTO no Yoritomo, and he became the first Kanto-moshitsugi (an institution in the court in Kyoto whose function was to communicate and negotiate with the Bakufu) and worked to maintain the relationship between the Imperial Court and the Kamakura bakufu.
経房は源頼朝と関係が密接であり初代関東申次となって朝廷と鎌倉幕府の関係調整にあたった。