Toishi Sharpening Stone Double-Sided 400/1000 3000/10000 Non-Absorbent 210x70x22mm Large Size

・[Profitable High-Quality 5-Stone Whetstone Set] This product is a set of five different grit whetstones: a #180 stone for reshaping, a #400/#1000 double-sided stone, and a #3000/#10000 double-sided stone. It can handle almost all sharpening needs, from rough grinding to ultra-finishing, depending on the application. The #180/#400 stones are ideal for repairing chips and restoring sharpness, while the #1000 stone is a versatile medium-grit stone for daily maintenance. The #3000 stone further refines the edge, and the #10000 stone achieves a mirror-like finish with exceptional sharpness and beauty. It also includes an upgraded non-slip base and an angle guide, making it a much better value than purchasing items individually. Please note that it cannot be used with ceramic knives or titanium, or other non-metal blades. ・[2026 New Manufacturing Method – Accurate Grit Whetstones] There are significant problems with grit accuracy in sintered whetstones. Issues such as “coarser than the stated grit,” “different grit numbers,” and “reversed grit numbers” are frequently reported. Therefore, our new poured-stone manufacturing method has arrived!!! This method minimizes the difference between the indicated grit and the actual grit, with a focus on the feel of grinding and the texture of the stone. We highly recommend it not only for beginners but also for those who prioritize the final finish. [No Need to Soak in Water – Non-Absorbent Whetstone] As a feature of the new poured-stone manufacturing method, it is non-absorbent. Instead of soaking the stone in water for 5-10 minutes before sharpening, simply apply a light coating of water before use for added convenience. ・[Easy-to-Use, Larger-Sized Whetstones] We often receive feedback that conventional 180x60x30mm double-sided whetstones are too small and difficult to use. As a solution, we designed the whetstone to be a larger size of 210x70x22mm. Compared to smaller whetstones, it is easier to apply the blade stably, and the sharpening feel is significantly improved compared to older models. Also, the larger surface area of the stone greatly increases sharpening efficiency, making it perfect for not only regular knives but also long knives and large knives that require a larger sharpening area. ・[True Double-Sided Whetstone] Almost all commercially available double-sided whetstones are made using the sintered method, and their grit is inaccurate. If a whetstone has accurate grit, it usually only has one grit per stone. To solve this problem, we produce each poured-stone whetstone with accurate grit and then bond them together using adhesive to create a double-sided whetstone. As a result, we have created a double-sided whetstone with accurate grit! Compared to commercially available double-sided whetstones, the grit is accurate and safe to use. Compared to single-grit stones, if you have the same number of stones, this one offers a greater variety of grits. ・[Quality Inspected] Our knife sharpening stone set is rigorously inspected at the factory, and durability and function tests are conducted not only in the kitchen but also by a third-party inspection company before shipment.

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device's requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.