Dust or trash holes dug under the eaves of the tea hut *chashitsu 茶室, the waiting shelter *koshikake machiai 腰掛待合, and the toilet *sunasetchin 砂雪隠. Square chiriana are usually about 36 cm deep, and circular chiriana about 20 cm deep. The protruding section is 1 cm from the ground surface, with the lip about 2.5 cm wide. The perimeter area is plastered, and a small stone called the peep stone nozoki-ishi 覗石 is placed on the edge of the chiriana. Green bamboo chopsticks are also provided for disposal of waste. According to the Chanoyu ichieshū 茶湯一会集 by Ii Sōkan 井伊宗観 (Ii Naosuke 井伊直弼, 1815-60), when no chiriana is provided a waste basket can be used for the disposal of leaves and twigs. Izumigusa 和泉草 discusses the convenience of the placement of a circular chiriana in the toilet, and Sōshun'ō chadōkikigaki 宗春翁茶道聞書 advises a square chiriana be built near the waiting room if there is no toilet there.
