Once the peace was established, however, Noritane was no longer able to declare himself the head of the Chiba clan, so he was against this peace negotiation together with Kageharu NAGAO, who repeatedly attempted to exact revenge on the Yamanouchi-Uesugi family throughout his life, and his nominal lord was still Shigeuji ASHIKAGA but he decided firmly to prevent Shigeuji from returning to the Koga Imperial Palace.
しかし和議が整うと孝胤は千葉氏当主を自称できなくなり、山内上杉家に終生復讐を繰り返した長尾景春とともに、和議に反対し名目上は足利成氏を主君としながらもその古河御所への帰城は阻止する方針を固めた。