noun
Euphemistic or literary term for a toilet; not used in everyday conversation. The reading かんしょ is also possible but less common.
古い旅館では、閑所が廊下の突き当たりにあった。
In the old inn, the toilet was at the end of the hallway.
noun
quiet place; secluded spot
Literary or formal term for a calm, out-of-the-way location. Rare in modern speech; 静かな場所 is the usual expression.
彼は俗世を離れ、山奥の閑所で読書にふけった。
He left the mundane world and immersed himself in reading at a quiet place deep in the mountains.
Compound of 閑 (kan, 'quiet, leisure') and 所 (jo, 'place'). The 'toilet' sense is a euphemistic extension of 'quiet place'.