noun
toilet in a Zen monastery
Specifically refers to the lavatory within a Zen Buddhist monastery. The term is technical and not used in everyday conversation.
See also: 東浄
禅寺では、東司は修行の場の一つとして清潔に保たれる。
In a Zen temple, the toilet is kept clean as one of the places of practice.
Also means 'toilet in a Zen monastery'; 東司 is a variant with the same meaning.
The term is composed of 東 (east) and 司 (office, administer). The exact origin is uncertain, but it is traditionally used in Zen monasteries to refer to the lavatory.