Then, Kagekatsu took Kikuhime (Daigiin), Katsuyori's half sister by a different mother, as his lawful wife in December and concluded the Koetsu Alliance (an alliance between the Takeda clan in Kai Province and the Uesugi clan in Echigo Province), so that the relationship with the Takeda clan would be strengthened.
同年12月に勝頼の異母妹菊姫(大儀院)を正室に迎えて甲越同盟を結び、武田家との関係を強化した