Meanwhile, Ujichika supported Soun's advance to the Kanto region, intervening in the Chokyo Rebellion and siding with the Ogigayatsu-Uesugi clan in battle against the Yamanouchi-Uesugi family.
一方、氏親は早雲の関東進出にも協力して長享の乱に介入、扇谷上杉氏に味方して山内上杉家と戦った。