土佐藩
Chōshū's subsequent victory over the Tokugawa army in 1866 and the impending collapse of the Tokugawa shogunate made Ryōma a valuable commodity to his former masters in Tosa, and recalled to Kōchi with honours. The Tosa Domain was anxious to obtain a negotiated settlement between the "Shōgun" and the Emperor, which would prevent the powerful Satchō Alliance from overthrowing the Tokugawa by force and thus emerging as a new dominant force in ruling Japan. Ryōma again played a crucial role in the subsequent negotiations that led to the voluntary resignation of the Shogun Tokugawa Yoshinobu in 1867, thus bringing about the Meiji Restoration.