It also had a close relationship with the Imperial Court because of its power in the key areas of Tokaido connecting Kyoto and Kamakura; and when the Minamoto clan was broken in 1221and Retired Emperor Gotoba staged a rebellion in an attempt to reclaim the throne and overthrow the Kamakura bakufu, it fought together with samurai around Kyoto who were against the shogunate, and Shigenari ASUKE, who was a child of Shigehide ASUKE, died in the battle (the Jokyu War).
京都と鎌倉を結ぶ東海道の要地に勢力を持った足助氏は朝廷との繋がりも深く、後に源氏将軍家が断絶し承久3年（1221年）に後鳥羽上皇が倒幕の兵を挙げると一族は京方として戦い、足助重秀の子足助重成が討死にした（承久の乱）。