Shin'ichi Kasai (笠井 信一, Kasai Shin'ichi; 22 July 1864 – 25 July 1929) was a Japanese bureaucrat in the Home Ministry and politician who served as governor of Iwate Prefecture (from 1907 to 1913), Shizuoka Prefecture (1913–1914), and Okayama Prefecture (1914–1919), before becoming Director-General of the Hokkaidō Agency from April 1919 to May 1921. He was then appointed to the House of Peers.
Source: “Shin'ichi Kasai”, English Wikipedia (CC BY-SA 4.0), excerpt