It appears that only the clans who had the titles of Mahito, Asomi/Ason, Sukune, and Imiki could produce the officials of nishiki no koburi (the seventh grade of twenty-six grades of cap rank) in the future Kan-i system (Office and Rank System).
また、のちの冠位制度上の錦冠の官僚を出すことのできるのは真人、朝臣、宿禰、忌寸の姓を持つ氏に限られていたようである。