The status of a Daimyo was defined as Kokushu if their territory was one province or more, or an equivalent number of koku, as Joshu Daimyo (joshu class) if they had a castle, those without a castle were distinguished as Jinya, and the rooms that they occupied at Edo castle during their service there were differentiated based on the Daimyo's status.
また、大名の格式として領地が1国以上またはそれに準ずる石高であるものを国主、城をもつものを城主大名（城主格）、城をもたないものを陣屋といって区別し、大名が江戸城に参勤した際に詰める部屋も格式に応じて分けられた。