Koide Shikada-yaki Mortar This is a traditional pottery (Onta-yaki) from the Edo period, made in Sarayama, Hita City, Oita Prefecture. The inside has radial grooves called "kushime" (comb marks), which makes it easy to use as a mortar, and it can also be used as a large bowl. It is handmade by skilled craftsmen, and each one has its own unique character. It was popularized by Soetsu Yanagi, the founder of the Folk Craft Movement. It has a jagged surface like a mortar, but it can be used as a regular serving bowl.