When Kamakura-kubo (Koga-kubo) Shigeuji ASHIKAGA, who was at odds with Kanto-Kanrei Uesugi clan in Kyotoku War, was searched and killed by the bakufu, Masatomo ASHIKAGA, a younger brother of shogun Yoshiaki ASHIKAGA, was appointed as new Kamakura-kubo.
なお、享徳の乱によって関東管領である上杉氏と対立した鎌倉公方（古河公方）足利成氏が幕府の追討を受けると、将軍足利義政の弟足利政知が新しい鎌倉公方として鎌倉に下った。