The origin of the Aso clan, the daiguji of Aso-jinja Shrine having political ruling power, could date back to Korenobu ASO (Korenobu UJI) who lived in the early twelfth century according to records.
統治能力を持ちあわせた阿蘇神社大宮司としての阿蘇氏は、記録上12世紀前半の阿蘇惟宣（宇治惟宣）にまで遡ることができる。