後こう架かこうかMeanings1nountoilet; lavatoryArchaic term for a toilet, especially in a Zen temple or monastery. Not used in modern everyday Japanese.禅ぜん寺でらでは、後こう架かは修しゅ行ぎょうの場ばの一ひとつとされていた。In Zen temples, the toilet was considered one of the places for practice.