The north side of the imperial palace of the retired emperor was designated as the guardroom, and hokumen referred to the public servants such as courtier and guardians who stood by to guard and accompany the retired emperor during his outings.
院御所の北面を詰所とし、上皇の側にあって身辺の警護あるいは御幸に供奉した廷臣・衛府の官人らをいう。