Kasumi Knives are produced by the Sumikama Cutlery factory in Seki Japan. Sumikama specializes in producing knives from the most advanced materials, with the most advanced manufacturing techniques. Kasumi Sharpening Accessories are designed specifically for use with Kasumi knives, but can be used for any Japanese knife brand. Always follow the sharpening instructions on the packaging. Colored marble pattern introduces style into the kitchen 2000 Grit (Fine) for polishing an edge to a razors finish The non slip silicone mat included provides a stable base for the whetstone, ensuring it does not slip during sharpening Use this sharpener with your Kasumi brand knives, and any other slim Japanese style blades Made in Japan