応天門の変 おうてんもんのへん Meanings Expression, Noun Ōtenmon incident (conspiracy in 866 CE that centered on the destruction of the main gate of the Imperial Palace) Kanji 応 respond. Read as オウ. 天 heaven. Read as テン. 門 gate. Read as モン. 変 change. Read as ヘン. Jinuma: Japanese Dictionary · Word lists