It is a mortar (Grinding Bowl) of “ripple comb” with beautiful curves like waves made in Tajimi City, Gifu Prefecture. The mortars are usually drawn in a straight line, but by making it rippled, you can slide smoothly without choosing a dominant hand, without putting strength. As it can slide firmly without missing frictional force, it is recommended for those who are left-handed, as well as for woman and elderly. It is available in 4 sizes.
As one of the Mino ware, it is a ceramic ware baked around Takada and Onada that originated in 1616. It is made from "blue soil" called "Aoto" taken from "Takata" and is considered as a kind of earthenware soil.