For a long time historians had considered that the conflict between 'Saccho' (the alliance between the Satsuma clan and the Choshu clan) and the Shogunate had driven the politics at the end of the Tokugawa Shogunate, however, recently Yoshiki IECHIKA, an assistant professor of Osaka University of Economics, proposed the new idea of 'the Ichikaiso Government' for the simple reason that it's impossible to grasp the whole political situation during the tempestuous period from only the past historical point of view.
大阪経済大学助教授の家近良樹が、幕末期の政治状況は従来の薩長と幕府との対立というだけでは説明できないとしてこの「一会桑政権」と呼ばれる歴史概念を主張している。