It is considered that the compromise was made because OKUBO recognized the importance of a centralized government in the process of promoting Haihanchiken, the abolition of feudal domains and establishment of prefectures, and agreed on the policy of KIDO and others; separation of the part that specialized in the promotion of industry divided the power concentrated in the new merged ministry; and the OKUBO's faction wanted to avoid an all-out conflict with the young officials of the Kaimeiha faction who were to lead the future government.
これは廃藩置県などの推進の過程で大久保が中央集権の必要性を認めて木戸らの方針に同意する方向へと変わると同時に、殖産興業の分離で合併後の新省が持つ権限の分割に成功したこと、更には将来の政府を担う開明派若手官僚との全面衝突を避けたいとの思惑があったからであると言われている。