When the 13th Shogun, Yoshiteru ASHIKAGA was killed by the army of Yoshitsugu MIYOSHI, Miyoshi sanninshu (three chief retainers of the Miyoshi clan) and Hisahide MATSUNAGA having Yoshihide ASHIKAGA, Yoshiteru's younger cousin, at their head and then Yoshiaki ASHIKAGA, Yoshiteru's real younger brother was pursued, Kiyonobu followed Yoshiaki to escape to Echizen Province for help of Yoshikage ASAKURA.
清信は、13代将軍　足利義輝が従弟足利義栄を奉じる三好義継、三好三人衆・松永久秀の軍勢に討たれ、義輝の実弟　足利義昭に追跡の手が及ぶと、義昭に随行し越前国の朝倉義景の下に逃れた。