Ujimasa who was the legitimate son of Ujiyasu followed his father's will to `make peace with TAKEDA again' (according to a different theory, this was Ujimasa's own policy), he broke off the alliance with Kenshin, and offered his younger brothers, Ujitada HOJO, and Ujinori HOJO hostages for Kai Province, restoring the Koso Alliance with Shingen on January 22, 1572.
後を継いだ嫡男の氏政は、「再び武田と和睦せよ」との亡父の遺言に従い（氏政独自の方針との異説あり）、謙信との同盟を破棄して弟の北条氏忠、北条氏規を人質として甲斐に差し出し、12月27日(旧暦)には信玄と甲相同盟を回復するに至った。