noun
A common word for a toilet or restroom, but it can sound more direct, old-fashioned, or less refined than トイレ or お手洗い. Often used straightforwardly for the facility itself, as in 公衆便所.
See also: トイレ
便所は廊下の突き当たりにあります。
The restroom is at the end of the hallway.
公園の便所は夜になると閉まる。
The toilet in the park closes at night.