The Captain often served concurrently as Middle Counselor or Royal Advisor (Second Rank or Third Court Rank), and traditionally, one out of four Captains, including Captains of the Left and the Right Divisions of the Outer Palace Guard, served as the head of the Police and Judicial Chief offices.
中納言・参議（位階）としては二位・三位）との兼官が多く、また左右衛門督を加えた計4名のうちの1人が検非違使別当を兼ねるのが慣例であった。