According to Suguru SASAKI, there was only a plan to raise Rinnojinomiya who became the leader of Ouetsu-reppan alliance to the Imperial Throne and to change era name to 'Taisei' in the year of his enthronement.
佐々木克によると、奥羽列藩同盟の盟主となった輪王寺宮を天皇に推戴し年号を「大政元年」とする構想があったにすぎないとする。