The idea might be first suggested by Takeaki ENOMOTO: He thought of moving surviving retainers of the Tokugawa Clan to Hokkaido and letting them undertake the guard and reclamation of the northern territory, and holding up this plan, fought the Battle of Hakodate against the new government.
そのおそらく最初のものは、徳川氏の遺臣を移して北方警備と開墾に従事させようとする榎本武揚の考えで、彼はこの計画を掲げて新政府と箱館戦争を戦った。