As he had an estate in Hirayama-go Village, Funakita no sho (manor), Tasai Country (present Hirayama, Hino City, Tokyo Prefecture) and lived in In no Mushadokoro (place where Samurai of guard of the Retired Emperor's Palace is staffed), he was called HIRAYAMA no mushadokoro.
多西郡舟木田荘平山郷（現東京都日野市平山）を領し、院武者所に伺候したため平山武者所と呼ばれた。