Ōkubo Toshimichi (Japanese: 大久保 利通; 26 September 1830 – 14 May 1878) was a Japanese statesman and samurai of the Satsuma Domain. Regarded as one of the main founders of modern Japan, he was one of the "Three Great Nobles" who led the Meiji Restoration in 1868, alongside Kido Takayoshi and Saigō Takamori. His policies, often characterized by realism and a focus on national strength (fukoku kyōhei), has led some historians to compare his role in Japan to that of Otto von Bismarck in Prussia.
Beginning his career as a low-ranking retainer in Satsuma, Ōkubo became a central figure in the movement to overthrow the Tokugawa shogunate, and following the restoration of imperial rule became a prominent leader in the new Meiji government. As a junior councilor and later in key ministerial posts, he was a principal architect of the new state, driving reforms that dismantled the old feudal structure. His most significant achievement in this period was the abolition of the han system in 1871, which centralized the country under the Tokyo government.