Together with bowl that is used for eating and takuhatsu (a traditional form of begging, common to Buddhist monks in Japan), these are known as sanneippatsu and deemed necessary articles for a priest.
これに食事や托鉢に使う応量器をあわせて、三衣一鉢（さんねいっぱつ）と呼び、僧侶の必需品とされた。