Japanese Nakayama Kyoto Natural Finishing Whetstone – Kato Kozan Mark – Vintage Natural Sharpening Stone – approx. 310 g A genuine Japanese natural finishing whetstone from the famous Nakayama mine in Kyoto, one of the most respected sources of premium sharpening stones in Japan. Nakayama stones are highly valued among professional sharpeners and collectors for their exceptional finishing capability on high-quality Japanese knives, razors, and tools. This stone bears the mark of Kato Kozan, a historical distributor known for handling high-grade Kyoto natural whetstones. Since the Nakayama mine is no longer actively producing stones, authentic examples have become increasingly rare. The stone displays a beautiful golden-beige natural surface with visible geological layers and mineral patterns typical of genuine Nakayama finishing stones. A dark line visible on the surface is a natural mineral line and not a structural crack, and it does not affect usability. The sides and back retain natural quarry textures, adding to the authenticity and collector appeal of the stone. A compact and dense finishing stone suitable for polishing knives, razors, and tools, and also an excellent collectible example of Kyoto sharpening stone heritage. Specifications: Type: Natural whetstone (finishing stone) Origin: Nakayama Mine, Kyoto, Japan Mark / Distributor: Kato Kozan Material: Natural sedimentary sharpening stone Weight: approx. 319 g Color: golden-beige with natural mineral patterns Condition: Very good vintage condition Flat usable sharpening surface Natural quarry texture on sides and back Dark line on the surface is a natural mineral line, not a crack Shipping: DHL or JAPAN POST Delivery usually takes 1–2 weeks. Import Information: Buyers are responsible for any customs duties, import taxes, or additional fees that may apply in their country. In case of cancellation or refusal after shipment, return shipping costs and any related import charges will be the buyer’s responsibility. The item will be securely packaged and shipped promptly. Delivery time may vary depending on the destination and shipping carrier.