ðə wʌzɐ kənspˈɪɹəsi ðæt tˈʊk plˈeɪs ɪn ˈeɪthˈʌndɹɪd sˈɪksti sˈɪks ænd sˈɛntɚd ɔnðə dᵻstɹˈʌkʃən ʌvðə mˈeɪn ɡˈeɪt ˈoʊtɛnmən ʌvðɪ ʌvðɪ ɪmpˈɪɹiəl pˈælɪs ɪn kaɪˈoʊɾoʊ, dʒəpˈæn.
The  was a conspiracy that took place in 866 and centered on the destruction of the main gate (Ōtenmon) of the  of the Imperial Palace in Kyoto, Japan.