expression, noun
Ōtenmon incident
A specific historical event in 866 CE involving the destruction of the main gate of the Imperial Palace and the subsequent political conspiracy. Used only in historical contexts.
応天門の変は、平安時代前期の政変の一つである。
The Ōtenmon incident is one of the political upheavals of the early Heian period.
The name derives from the Ōtenmon gate (応天門) of the Imperial Palace, which was burned down in 866 CE, leading to a major political incident.