Or, suna setchin, 砂雪隠 (snow-hide).
A feature of some Japanese tea gardens, located near the inner waiting bower, symbolic of a host's regard for his guests…no, that’s not quite the right idea…
In order to explain this rightly, you have to remember that every detail of a tea garden serves some purpose. There is a distinction between the inner and outer gardens (and perhaps one or more additional zones), in that worldly cares are, perhaps, still present, in this outer zone, and can be purified in this liminal space. Here one might find a working lavatory, whether modern (with adaptations) or traditional, meant to be used to refresh the guests, a place to change into traditional garb, etc.
The operative word for this part of the garden is “pretty”. There might be flowering plants, eye-catching decorative elements, things that charm and interest. It looks like a garden. Things are planned, and what is part of the human realm (like that
…