It can be thought that behind this, there was an internal conflict of the Hojo family between the son of Tokimasa's ex-wife (Yoshitoki) and Tokimasa, who supported the son-in-law of his second wife (Tomomasa), and the discord between the Hatakeyama clan and the Hojo clan over the dominance of Musashi Province, which was an powerful province adjacent to Kamakura.
これは時政の先妻の子（義時）と後妻の娘婿（朝雅）を担ぐ時政との北条家内の対立と、鎌倉に隣接する有力国武蔵の支配を巡る畠山氏と北条氏の軋轢が背景にあったものと考えられる。