Admiral Seniavin (Russian: Адмирал Сенявин), was a Admiral Ushakov-class coastal defense ship built for Imperial Russian Navy during the 1890s. She was one of eight Russian pre-dreadnought battleships captured by the Imperial Japanese Navy from the Russians during the Russo-Japanese War of 1904–1905. She subsequently served in the Japanese Navy under the name Mishima (見島) until sunk as a target in 1936.