Since he could not become the kokushi (provincial governor) of Settsu Province where his first home base was, Yorichika served as Yamato no kami (Governor of Yamato Province) three times in his lifetime and continued instilling and expanding his power within the province.
当初の地盤であった摂津の国司任官を果たせなかった経緯もあり、頼親はその生涯で三度大和守を務め、同国内における勢力の扶植に邁進する。