Tennōji incident

The Tennōji incident (天王寺の変) occured in the present-day Tennōji-ku, Osaka on 16 March 1558. A group of dissatisfied samurai led by Yuri Kamanosuke and Mibu Tokito surrounded the Shitennō-ji (Temple of the Four Heavenly Kings) where shogun Mibu Kyouka had been billeted after a signing a treaty with the Ashikaga shogunate through Ashikaga Yoshiteru in Kyoto. The incident virtually ended the Mibu clan's influence on Honshu and some parts of Shikoku. It also sparked the first case of civil war in Teiko which lasted from 20 March 1558 until 28 February 1559.

Context
By the end of 1557, the Mibu clan's power and influence in Honshu and Shikoku was declining. Civil unrests and growing dissatisfaction had led many tribes and smaller daimyo to revolt. At this time, promiment vassals including the Mori clan, Amago clan and Sarutobi clan had also gone war to each other questioning whether the Mibu clan remains capable of controlling its vassals. In January 1558, Ashikaga Yoshiteru who was fighting to keep the Ashikaga shogunate alive sent an emissary to Mibu Kyouka inviting the latter for a visit in Nijo Palace in Koyo.