Born Apr. 17, 1837, in Kochi; died July 16, 1919. Japanese politician.
Itagaki participated in the abortive bourgeois revolution of 1867–68. He held several high government posts from 1868 to 1873, when he became leader of the liberal movement. Itagaki called for the adoption of a constitution and parliamentary form of government. In 1881 he organized the first bourgeois political party, the Jiyuto (Liberal Party), and was its president from 1881 to 1884. He was minister of internal affairs from 1896 to 1898. Itagaki retired from politics in 1900.