According to diaries written at that time such as the "Kanomon Nikki (Diary)" written by Emperor Hanazono's biological father, Gosukoin, the incident occurred on September 24 and the main people behind the incident were the Kinzosu and Tsuzosu brothers who were thought to be descendants of the Southern Court Emperor Gokameyama or his brother, MINAMOTO no Takahide, who claimed to be a descendant of the Retired Emperor Gotoba (Kamakura period) and Arimitsu HINO and Sukemitsu HINO, who came from a branch line of the Hino clan.
後花園天皇の実父である後崇光院が著した『看聞日記』をはじめとする同時代の日記類によれば、事件は9月24日に起こり、首謀者は南朝の後亀山天皇あるいはその弟の子孫とされる金蔵主、通蔵主の兄弟、鎌倉時代の後鳥羽上皇の後胤を称する源尊秀、日野氏傍流の日野有光、日野資光ら。