Jiro Yamagata (January 6, 1881 â January 9, 1936) was a Japanese politician who served as governor of Hiroshima Prefecture from October 1923 to September 1925. He was also governor of Ishikawa Prefecture (1922âÂÂ1923), Hyà Âgo Prefecture (1925âÂÂ1927), and Kanagawa Prefecture (1929âÂÂ1931).