It includes a low-height chozubachi (basin) provided for visitors to purify their hands before entering the teahouse, and several yaku-ishis (functional stones) arranged around the chozubachi.
茶室に入る前に、手を清めるために置かれた背の低い手水鉢につくばいの構成および役石をおいて趣を加えたもの。