The Rokkaku clan fought against the great army that Yoshiaki ASHIKAGA, as the Shogun, and Nobunaga ODA, who was from Owari Province, formed in order to go to Kyoto, and after the defeat of the subsidiary castle - Mitsukuri-jo Castle on September 13, Yoshikata ROKKAKU and Yoshiharu ROKKAKU fled Kannonji-jo Castle without any resistance.
尾張の織田信長が足利義昭を擁して上洛の大軍を興すと六角氏は敵対し、9月13日に信長に支城の箕作城を落とされると、六角義賢・六角義治は観音寺城から逃げ無血開城した。