There are many examples of grinding stones being used as raw materials for porcelain in Japan. Amakusa whetstone was first used in Mikawachi porcelain, and later became the most widely used raw material for porcelain in Japan. Kime was the first to use amakusa stone as a porcelain material in Kyoto, and it is said that he discovered amakusa stone at an abrasive stone wholesaler in Osaka. In Tobe, Iyo Province (Tobe Town, Iyo County, Ehime Prefecture), the early beginnings of porcelain were made, and in Sanda, Settsu Province (Sanda City, Hyogo Prefecture), celadon glaze was devised, both of which were related to whetstone, and there are many similar examples of this.
