After that, Kageharu NAGAO, who was the eldest son of Kagenobu NAGAO, became enraged because his uncle named Kagetada NAGAO to take over the position of the kasai of the Yamanouchi-Uesugi family, and so he ran away to Hachigata-jo Castle in Musashi Province (present-day in Hachigata, Yorii Town) against Akisada UESUGI in 1476; furthermore, he took the side of Shigeuji ASHIKAGA.
そしてその後、文明8年(1476年)には山内上杉家の家宰の家督を叔父の長尾景忠に継承させたことに怒り、上杉顕定に背いて武蔵国鉢形城（現在の寄居町鉢形）に走った長尾景信の嫡男長尾景春が足利成氏側に付いた。