This sole surviving example of a Muromachi period Zen style tosu (lavatory) is the oldest and largest in Japan, and has also come to be known as the 'hundred toilet' due to the fact that it was used many student monks simultaneously.
室町時代唯一、日本最古最大の禅宗式の東司（便所）の遺構で、多くの修行僧が一斉に用を足すことから百雪隠（ひゃくせっちん）とも呼ばれる。