According to archeologists, when they see the changes of Heguridani-kofun Tumulus Cluster (located in present Heguri Town) which is said to be the okutsuki (Shinto tomb) of the Heguri clan, the emergence of the Heguri clan cannot be traced before the middle of the sixth century.
考古学的な見地からは、平群氏の奥津城とされる平群谷古墳群（平群町に所在）の変遷を考えると、同氏の台頭は6世紀中期以前には遡れないという。