Shinsengumi was a military police force in Japan in the Edo era. Shinsengumi was organized by Katamori Matsudaira. He was an Aizu feudal lord. They were gathered to defend Kyoto against political opponents. Shinsengumi became famous by the Ikedaya Incident. They became part of the army after the Tokugawa shogunate was overthrown by a new government in the Meiji Restoration. Isami Kondo who was the head was arrested and punished. Toshizo Hijikata who was the subleader fought to the last battlefield in the Meiji Restoration. He was killed in the battle. Hajime Saito who was third section commander became a police officer in the Meiji Restoration.