After the 9th shogun Ashikaga Yoshihisa died in 1489 of disease leaving no heir while on a campaign against Rokkaku Takayori (Rokkaku Tobatsu), the daimyo of southern Omi province, Yoshitane became Seii Taishogun a year later. In 1493, Yoshitane rose against Hosokawa Masamoto and was replaced by the 11th shogun Ashikaga Yoshizumi.
Again in 1508, after the Battle of Funaokayama, with the support of Ouchi Yoshioki, Yoshitane regained the position of Seii Taishogun from Yoshizumi. However, finally after a power struggle with Hosokawa Takakuni, Yoshitane fled to Awaji Island and died in island of Shikoku. Hosokawa Masamoto replaced Yoshitane with the 12th shogun Ashikaga Yoshiharu.
Yoshitane was the son of Ashikaga Yoshimi and grandson of the 6th shogunAshikaga Yoshinori.
After the 9th shogunAshikaga Yoshihisa died in 1489 of disease leaving no heir while on a campaign against Rokkaku Takayori (Rokkaku Tobatsu), the daimyo of southern Omi province, Yoshitane became Seii Taishogun a year later.
In 1493, Yoshitane rose against Hosokawa Masamoto and was replaced by the 11th shogunAshikaga Yoshizumi.
Yoshitane was a son of Ashikaga Yoshimi (1439-1491) and was adopted by his uncle, Ashikaga Yoshimasa.
Yoshitane defeated the Rokkaku in 1493 but was forced from office that same year by his kanrei, Hosokawa Masamoto and replaced by his cousin, Ashikaga Yoshizumi.
In 1508 Ôuchi Yoshioki marched to the capital and reinstated Yoshitane as shôgun.