The clans who were given the position of Tomo no miyatsuko overlaps with those of clans who were given the position of Muraji; mainly these clans were powerful families who shared the duties of the divisions of the Yamato sovereignty.
連（むらじ）とも重なり合うが、おもにそのもとでヤマト王権の各部司を分掌した豪族である。