As descried above, the system of clans and hereditary titles was born by making the 'Naoi no Uji' (naming of the title revealing what the person does); people with these titles constituted the Yamato sovereign and took responsibility by working in the various functions which are hereditary and these hereditary titles included Muraji, Tomo no Miyatsuko, Momo Amari Yaso no Tomo in that order in the rank.
このように、氏姓制度とは、連―伴造―伴（百八十部）という、王のもとでヤマト王権を構成し、職務を分掌し世襲する、いわゆる「負名氏」（なおいのうじ）を主体として生まれた。