Katsuyori dispatched troops to Echigo in an attempt to intervene at the request for support from Kagetora, who was a younger brother of Ujimasa HOJO (a distant relative, according to one theory) and had been adopted out to Uesugi from Hojo.
勝頼は北条氏政の弟（遠縁との説もある）であり北条から上杉に養子として出されていた景虎の支援を要請されて越後への出兵を行い調停を試みた。