When Takauji ASHIKAGA defected from the Emperor Godaigo after the Nakasendai War in 1335, Kintsuna fought against the Takauji army but was defeated, and next year he surrendered to Takauji and became his vassal.
1335年の中先代の乱後に足利尊氏が後醍醐天皇から離反すると、公綱は尊氏軍と戦ったが敗れ、翌年に尊氏に降伏してその家臣となった。