Originally, a samurai's appointment to an officer was applied to the Imperial Court through the bakufu (Japanese feudal government headed by a shogun); Baishin (indirect vassal) and Roju (vassal) were not given any government position.
本来、武士の任官は幕府を経由して朝廷に申請され、陪臣・郎従が官職を授かることは無かった。