Enraged by Naosuke's policies, Emperor Komei issued Bogo no Micchoku (a secret imperial decree) to the Mito Domain and called for the II's expulsion, disregarding the order of samurai families.
直弼の対応に憤った孝明天皇は、戊午の密勅を水戸藩に下し、武家の秩序を無視して大名に井伊の排斥を呼びかける。