most of them are porcelain or stoneware . 材質は磁器、または炻器製が圧倒的に多い。
stone plates were the large ground stoneware used for smashing or milling . 石皿(いしざら)とは、粉砕や製粉作業に使われた大型磨製石器。
there is very few ground stoneware that were made from flakes , and beads are one of them . 剝片から製作する磨製石器はごく少数だが、玉類などがそれにあたる。
they were used to cut fur , meat or bark , and much sharper than the blade of ground stoneware . 毛皮や肉、樹皮などを切るために用いられ、磨製石器の刃よりも格段に鋭利であった。
earthenware or stoneware plates used to serve nishime (simmered food ) or other food in teahouses on kaido (roads ) in the edo period . 江戸時代、街道の茶屋などで煮しめ皿などに用いられた陶器や炻器の皿。