Tomonomiyatsuko is the Gozoku (local powerful clans) who administered each group of tsukasa (offices) in the Yamato Dynasty under or sometimes together with the clans of muraji (one of ancient Japanese hereditary titles denoting rank and political standing).
伴造（とものみやつこ）とは、連（むらじ）とも重なり、また連の下でヤマト王権の各部司を分掌した豪族である。