From the end of the Heian period, the heads of this family line were appointed secretary called 'suino' at the Bureau of Archives for generations--though sometimes intercepted by other families; from the latter half of the Muromachi period, the post became hereditary within this family line.
この系統は平安時代末期より代々の当主は蔵人所出納に任じられ、途中他氏が任じられることがあったものの、室町時代後期以後は世襲となっていった。