"Dainagon" (chief councilor of state) is a post ranking below Sadaijin (minister of the left), Udaijin (minister of the right), and Naidaijin (inner minister) in Daijokan (Grand Council of State), the highest organ in the Imperial Court, and corresponds to Suke (assistant director) in the Shitokan (four classifications of bureaucrats' ranks).
大納言（だいなごん）は、朝廷組織の最高機関、太政官の職の一つで、左大臣・右大臣・内大臣に次ぐ官位で、四等官の中の次官（すけ）に相当する。