Even after Takauji ASHIKAGA seceded from the new government in Kamakura, Kintsuna worked for the Southern Court, but his son, the 10th family head Ujitsuna UTSUNOMIYA was affiliated with the Ashikaga clan.
足利尊氏が鎌倉で新政から離反した後も公綱は南朝方として動いたが、子の10代宇都宮氏綱は足利氏に属した。