Naniwa #220 Japanese Sharpening Flattening Stone


Regular price¥3,300

Name: Naniwa Sharpening flattening stone
Size: 170mmx55mmx30mm
Grit: #220
Origin: Japan

This Sharpener Flattening Stone is a must-have for any knife enthusiast. After prolonged use of a whetstone the stone may become unflat or warped. This Stone is used to level the whetstone and bring it back to a perfectly flat state.

Naniwa Abrasive Mfg is a Japanese manufacturer of sharpening stones for industrial and domestic use, diamond tools for processing stones and other materials, sandblasting systems for stone engraving and a full range of abrasion related products with over 60 years of experience, dedication, and innovation. When we say, "cutting-edge technology", we mean literally! Thanks to constant efforts to bring quality and service to ever higher levels, when it comes to something related to abrasion, we can offer the best advice and advanced and easy-to-use products for the professional or home user. Our high levels of product quality and service are highly appreciated by customers in Japan and around the world.

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Availability Sheath: (Choosing the fit sheath)

■Please do not use the knife in a twisting motion.
■Please use the correct knife when cutting bone, frozen or hard items.
■Please note that the images are of the sample products. Colour, weight, pattern and size can differ as each product is handmade.
■Please use a soft plastic or wooden cutting board to protect the blades edge.
■Please don't heat or cool rapidly as it may change the structure of the steel.
■Please don't hesitate to contact us for further enquiries.

Customer Reviews

Based on 3 reviews

A very important tool when sharpening knives, half the work


The overall quality of the product was very good, I was very pleased with it an would highly recommend its use for other chefs.

Necessary tool for the specialists

This wetstone is absolutely necessary for those who sharpen their blades often. A wetstone for your wetsones! The thick grit allows to take down your wetstones back to a nice flat surface. The problem of a wetstone that has curved down in the middle section is that you wont be able to work uniformly during the sharpening. This little baby will solve that problem and allow you to work properly.

Also Consider

Product Features

Handmade Forging

With the traditional forging process, the molecules of the iron material are finely tuned, leading to the completion of a "living kitchen knife" that breathes.


The process of heating and forging each material for mold making is repeated three or four times to quickly shape the blade and create durability before the carbon is released from the steel causing it to lose its original strength.


The blade is the most important factor in achieving the best possible sharpness. It is polished in our own blade factory to produce uncompromising sharpness.


The highest priority is placed on sturdiness, a sense of luxury, and a shape that is easy to grip and does not cause fatigue even after long hours of use.

Material SharpnessRust-resistantHardness
Sliver steel #3★★★★★★★★★★★★★★★★
White steel #1★★★★★★★★★★★★
White steel #2★★★★★★★★★★★
Blue steel #1★★★★★★★★★★★★★★
Blue steel #2★★★★★★★★★★★★★
Aogami Super★★★★★★★★★★★★★★★


Best Price Guarantee

We are Japanese local manufacturer,sell directly to constumers.Guarantee the best price and high grade knives.

Always making an effort

Not only is it the best Japanese knife,but also try to improve our product's quality based on consumer feedback.

Worldwide Shipping

All orders will be shipped directly from Japan to the address you specify.