On April 27, 1863, a group of 13 people, including Kamo SERIZAWA and Isami KONDO formed Mibu-Roshigumi (the Mibu masterless warrior group), which was also called Seichu-Roshigumi, the predecessor of the Shinsen-gumi masterless warrior party.
文久3年（1863年）3月10日、芹沢鴨・近藤勇ら13名が新選組の前身、壬生浪士組（精忠浪士組とも呼ばれる）を結成。