Although the majority of the Hata clan branches called themselves the Koremune clan in the Heian period, there remained a number of branches, including the Togi family of Gaku ke (a family which served the Emperor as court musicians), which claimed descent from the Hata clan.
平安時代には多くが惟宗氏を称するようになったが、秦氏を名乗る家系（楽家の東儀家など）も多く残った。