Families of military art, such as military aristocrats, were born from Kanmu-Heishi (Taira clan), Seiwa-Genji (Minamoto clan) and some of the Fujiwara clan and their descendants later became samurai (warrior).
軍事貴族などの武芸の家は桓武平氏・清和源氏・一部の藤原氏などから出たが、彼らの子孫が後の武士へと成長していった。