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Sasaki clan are descended directly from Emperor Uda (868-897) by his grandson Minamoto no Masazane (920-993) (Uda Genji), Takaoka Muneyasu (1255–1326), grandson of Sasaki Yoshikiyo, is the first who took the name of Takaoka from his domain in Takaoka-mura, Enya-no-sato, Kamdo-gun, Izumo province.
This was an unusual appointment, in that custom dictated a member of the Fujiwara clan should have held the post of Chief compiler; it is thought that this was an attempt by Emperor Uda to undermine the increasingly-influential Fujiwara.