This period is exactly a transitional period from ancient times to medieval times since it had elements of the precursor to the medieval national polity while keeping the vestiges of the ancient Ritsuryo-based nation.
この時期は古代律令国家の残滓を見せつつも、次なる中世国家につながる時代性格も併せもっており、まさに古代から中世への過渡期に当たるといえる。