Whetstone For Tools NANIWA GOUKEN "KAGAYAKI" 10 Mm/20 Mm Stone With Plastic Clear Base Japanese Sharpening Stone Grit 400 Naniwa Lobster Waterstone 220 Grit The Naniwa Gouken Kagayaki Waterstone Twin Set is a must-have for anyone looking to keep their knives in top shape. This set includes two stones – a 220 grit for some serious grinding and a 1000 grit for that smooth finish Globalkitchen Japan sells NANIWA Gouken Kagayaki Sharpening Stone. Made in Japan. This sharpening stone allows you to smoothly sharpen all kinds of steel knives except for ceramic knives. No need to soak the stone in water, you can use it right after splashing some water on the surface International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.