descended from Uda Genji or Seiwa Genji.
- This clan's origin is a descendant of Sasaki clan in Ōmi Province. 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. It is a clan who prospered in future generations, in Izumo, Bingo, and Tajima. Takaoka clan who was the Kawarake-han (in Izumi) samurai at the first term of Edo period was the same as this clan. Afterwards, the Lord of Izumi (Koide Sigeoki clan) had lost their territories on August 12, 1696, Takaoka clan lived temporarily in Edo. After that, this clan moved to Tajima because they had become old Lord Koide Shigeoki's relative of Lord of Tajima (Koide Fusateru)'s vassal.