After the death of Akitaka, the pressure from the Nanbu clan increased and at the time of Akinao SHIBA, Kichibe TAKADA, a younger brother of Masazane KUNOHE who was adopted into the family of his bride, switched to the side of the Nanbu clan and seduced Yoshinori IWASHIMIZU and Hideshige OGAYU.
詮高の死後には南部氏の圧力が増し、斯波詮直のときに入婿していた九戸政実の弟高田吉兵衛が南部氏に寝返り、岩清水義教や大萱生秀重を諜略した。