Hideyasu is from the samurai clan in the Kinai-Kingoku area serving retired emperors as Hokumen no Bushi (the Imperial Palace Guards) and Saimen no Bushi (the Imperial Palace Guards) and he successively held the position of Kokushi (provincial governors) including Shimotsuke Province, Kawachi Province, Bizen Province and Noto Province whereby he was considered to be a man of an unparalleled wealth.
北面の武士、西面の武士として院号に仕える畿内近国の武士の一族で、下野国、河内国、備前国、能登国など国司を歴任し、富裕ならびなき者とされた。