When Isami KONDO, Head of the Shinsengumi, presented himself to the New government army in Nagareyama City when the Boshin War broke out, he followed the vice chief Toshizo HIJIKATA who went separate ways from the main unit of the Shinsengumi and joined the former army of bakufu (Japanese feudal government headed by a shogun) including Keisuke OTORI.
戊辰戦争時、流山市で局長近藤勇が新政府軍へ出頭すると、新選組本隊とは別行動を取った副長土方歳三に従って、大鳥圭介ら旧幕府軍と合流。