After his father, Yoshiharu, was forced to retire in 1546 over a political struggle with
Hosokawa Harumoto, Yoshiteru became
Sei-i Taishōgun, albeit a puppet
shōgun like his father. Yoshiteru was only 11 at the time and his investiture ceremony was held at Sakamoto,
Ōmi Province, outside
Kyoto. Yoshiteru had barely been confirmed as
shōgun when his father Yoshiharu made a truce with Harumoto to return to Kyoto. Yet, Harumoto's retainer
Miyoshi Nagayoshi parted with Harumoto to take the side of
Hosokawa Ujitsuna and the two Hosokawa started a war that drove out Yoshiteru, his father Yoshiharu, and Harumoto as well, from Kyoto. In 1550, Yoshiharu died in Ōmi, unable to return to Kyoto. In 1552, Yoshiteru made a peace with Nagayoshi to return to Kyoto. However, the next year, Yoshiteru and Harumoto started a war against Nagayoshi to remove his influence. With the help of
Rokkaku Yoshikata, the war initially went well for Yoshiteru but he was driven out of Kyoto again in 1558 with a counterattack from Nagayoshi. Nagayoshi did not press on after the victory to kill Yoshiteru for fear of being accused of killing a shogun, and instead signed a truce to have Yoshiteru back in Kyoto under his influence. Nagayoshi continued as the real power in Kyoto, with Yoshiteru nothing more than a rubber stamp. Finally, in 1565,
Matsunaga Hisahide invaded Kyoto, which led to a tragic turn of events as Yoshiteru decided to take his own life. ==Governance==