Because guests have to lower their heads to go through the nijiriguchi, a kijinguchi (an ordinary walk-in paper sliding door) is often built in addition to the nijiriguchi to welcome high ranking people.
にじり口には頭を下げなければ入れないので、貴人を迎える場合のため、にじり口とは別に貴人口（立ったまま入れる普通の障子戸）を設けることも多い。