飲室の玄関東にある簀の子流しの下に敷いている石です。畳ぐらいの面積がある大きな石を硯のように削り、外に水を流すようになっています。This is a pic of the stone which was used for sink under the draining board placed at the right side of Inshitsu-entrance. The sink is carved from Tatami-size rock as if Suzuri is manufactured,and it leads waterdrops to outside drain.
