However, no historical material that associates Yorikuni with Nose has been found by now, so Kunimoto, who is said to be the direct ancestor of the Nose clan, was a figure who lived from the late to the end of the Heian period.
しかし、現在のところ頼国と能勢を関連付ける史料は確認されておらず、能勢氏の直接の祖とされる国基は平安時代後期から末期にかけての人物である。