Since Osauji KIRA who was an ancestor of the Kira and Imagawa clans was an older brother of Yasuuji ASHIKAGA who succeeded to the heir of the Ashikaga family, he played an important role as the Ashikaga clan following the Kira clan.
吉良氏・今川氏の祖であった吉良長氏は、足利家惣領を継いだ足利泰氏の兄にあたることから、吉良氏に次ぐ足利一門として重きをなした。