Tainei-ji incident

Tainei-ji incident
Part of the Sengoku period
The graves of Ōuchi Yoshitaka and his valet in the grounds of Tainei-ji, Nagato, Yamaguchi
Date September 28–30, 1551 Location Tainei-ji temple, Nagato Province (present-day Yamaguchi Prefecture), Japan Result Sue victory; Ōuchi Yoshitaka commits suicide
Belligerents
Ōuchi forces under Sue Takafusa	Close retainers of Ōuchi Yoshitaka
Commanders and leaders
Sue Takafusa Sugi Shigenori Naitō Okimori	Ōuchi Yoshitaka † Sagara Taketō †
Strength
5,000[1]	Originally 3,000, but only 20 left in the end after defections and desertions[1]

The Tainei-ji incident (大寧寺の変, Taineiji no Hen) was a coup d'etat in September 1551 led by Sue Takafusa (later known as Sue Harukata) against Ōuchi Yoshitaka, hegemon and shugo daimyō of western Japan, which ended in the latter's forced suicide in Tainei-ji, a temple in Nagato Province. The coup put an abrupt end to the prosperity of the Ōuchi clan, though they ruled western Japan in name for another six years under the figurehead Ōuchi Yoshinaga, who was not related to the Ōuchi by blood.