The shogun has forbidden Hosokawa to aid Masanaga, who attacks Yoshiyoshi without him, is defeated, and escapes to Kyoto.

The shogunate has long forbidden battles between daimyo, and this flouting of the rules leads to open fighting between rival daimyo factions and the speedy disintegration of the Muromachi shogunate’s authority.

Hosokawa raises an army in May, seizes the shogunate residence of Hana-no-Gosho, and coerces the shogun into proclaiming for Hosokawa’s side and denouncing Yamana as a rebel.

Ouichi Masahiro, another leading daimyo, supports Yamana by marching his army to Kyoto, rescuing Yoshinao from Hosokawa and proclaiming him the new shogun.

The battle at Kyoto ends in stalemate, but fighting in what is called the Onin War escalates throughout Japan.

Kyoto's northern parts are in ruins by September, and everyone who can flee from Kyoto does so.

Authority in Japan is diffused to local military leaders, the daimyo, when the Ashikaga lose control of their vassals after 1467.

The dispute between Hosokawa Katsumoto and Yamana Sōzen escalates into a nationwide war involving the Ashikaga shogunate and a number of daimyo in many regions of Japan

The shogun Yoshimasa, who has reigned since 1440, simply turns his back on the troubles in Japan.

In 1473, he retires to his estate on the outskirts of Kyoto, where he builds the Silver Pavilion (“Ginkaku”) and becomes the patron of a remarkable artistic flowering.