---
product_id: 52954995
title: "Whetstone Sharpening Stone SHAPTON Ceramic KUROMAKU #320 by Shapton"
brand: "shapton"
price: "¥20863"
currency: JPY
in_stock: true
reviews_count: 12
category: "Shapton"
url: https://www.desertcart.jp/products/52954995-whetstone-sharpening-stone-shapton-ceramic-kuromaku-320-by-shapton
store_origin: JP
region: Japan
---

# Compact 8.3 x 2.8 x 0.6 in size Durable ceramic material, long-lasting 320 grit for aggressive metal removal Whetstone Sharpening Stone SHAPTON Ceramic KUROMAKU #320 by Shapton

**Brand:** shapton
**Price:** ¥20863
**Availability:** ✅ In Stock

## Summary

> 🔪 Sharpen like a pro, stand out with every slice!

## Quick Answers

- **What is this?** Whetstone Sharpening Stone SHAPTON Ceramic KUROMAKU #320 by Shapton by shapton
- **How much does it cost?** ¥20863 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/52954995-whetstone-sharpening-stone-shapton-ceramic-kuromaku-320-by-shapton)

## Best For

- shapton enthusiasts

## Why This Product

- Trusted shapton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Portable:** Sleek 8.3-inch design fits any workspace or travel kit
- • **Dual-Use Storage Case:** Protects stone and doubles as a stable sharpening base
- • **Durable Ceramic Build:** Engineered for longevity and consistent performance
- • **Precision Rough Grinding:** 320 grit sharpens blunt and damaged blades fast
- • **Innovative Color-Coded Edge:** World’s first black edge for easy grit identification

## Overview

The Shapton Kuromaku #320 ceramic whetstone delivers rapid, precise rough grinding with its coarse 320 grit surface. Compact and lightweight, it features a unique black color-coded edge for easy grit recognition and comes with a dual-purpose plastic case that protects the stone and serves as a stable sharpening base. Trusted by professionals for durability and consistent performance, it’s ideal for restoring blunt or chipped knives quickly and efficiently.

## Description

A staple of long-selling solid whetstone. Comes with a plastic case that can be used as a sharpening base. The black edge of the blade is the world's first color-coded whetstone for each coarseness The convenient storage case can also be used as a grinding base. Can also be used as an oil stone

Review: Good, even excellent - This is a good, even excellent, whetstone. For, it does the job, gives reasonable feedback (i.e. one can feel what one is doing), does not have any problem with slurry, and it does not seem to wear especially fast. I have used it with success on low-carbon knives and medium-carbon knives. I have not tested it on any very high carbon knife, though I imagine that it would work on such a knife. Other reviews here say that it does. The price is pretty good. I add the following (and in so doing I echo somewhat one of the other reviews). This remark of mine will concern medium or high-carbon knives, i.e. hard knives. If one is changing the angle of such a knife, and/or perhaps is the knife is really blunt, then one needs a coarse stone, like this one. For, under those conditions, using a less coarse stone makes it hard to get the knife sharp. (Still, what counts as less coarse? Perhaps 400 grit and above. Certainly 800 grit and above. But I'm talking about standard synthetic stones here. Matters might be different with diamond stones. As to natural stones, some of them are very hard, but at least most such stones will have a grit north of two thousand, which, for the sort of work at issue, will take forever.) I would not try to use the whetstone atop its box - as shown in one of the photographs provided by the seller. I imagine that that would work badly. One needs a proper whetstone holder. For _storing_ the stone, the box is fine, though I prefer the Naniwa boxes. (Incidentally: to my knowledge, Naniwa does not do a stone in the 300-400 grit range, at least not within its more serious lines of stones.)
Review: Great coarse stone - Works well. Takes down metal quickly and effortlessly, ready for the next stage. Definitely a must if you need to reprofile, thin, or correct chips etc. Or just to get a fast edge on an especially blunt knife. For a rough grit, this doesn't seem very soft, which I like. This stone should last a long time. I had an old 220G wet stone, it needed flattening after every use, didn't last long at all. Not the case here. My two cents on sharpening grits; I feel like new sharpeners are scared of coarse grits because they don't want to damage anything, so they tend to start at too fine a grit. It's important to remember the amount of material you remove to get from blunt to sharp is the same regardless of grit. The difference is how many strokes it takes you. It's not a small difference either, if you start with a blunt knife (butter knife) with a 220, 400, 1000, 3000. You could get a mirror polished, hair popping edge in about fifteen minutes, if you started with 1000 or 3000 you could genuinely be there for hours and not achieve what you want. And you would have used up a lot of expensive stone. You can get a shaving sharp edge with (skill) this stone and a strop. The finer grits get you a nice polished egde. Although I think it's generally accepted that 1000G is ideal for dressing a "not too blunt" knife.

## Features

- Uses: Rough grinding (320)
- Grit size: #320
- Product Dimensions: 8.3 x 2.8 x 0.6 inches (210 x 70
- Weight: Approx. 17.6 oz (500 g)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004D2GCR6 |
| Best Sellers Rank | 173,996 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 144 in Manual Knife Sharpeners |
| Brand | Shapton |
| Colour | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (5,744) |
| Date First Available | 7 Aug. 2012 |
| Item Weight | 500 g |
| Material | Ceramic |
| Model Number | 3-0222-0103 |
| Product Dimensions | 21 x 7 x 1.5 cm; 500 g |

## Product Details

- **Brand:** Shapton
- **Colour:** White
- **Global Trade Identification Number:** 04944509307092
- **Grit type:** Rough
- **Item weight:** 500 Grams
- **Manufacturer:** Shapton
- **Material:** Ceramic
- **Number of items:** 1
- **Product dimensions:** 21L x 7W x 1.5H centimetres
- **UPC:** 785533903218

## Images

![Whetstone Sharpening Stone SHAPTON Ceramic KUROMAKU #320 by Shapton - Image 1](https://m.media-amazon.com/images/I/61Tq9unBNDL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good, even excellent
*by S***T on 11 May 2025*

This is a good, even excellent, whetstone. For, it does the job, gives reasonable feedback (i.e. one can feel what one is doing), does not have any problem with slurry, and it does not seem to wear especially fast. I have used it with success on low-carbon knives and medium-carbon knives. I have not tested it on any very high carbon knife, though I imagine that it would work on such a knife. Other reviews here say that it does. The price is pretty good. I add the following (and in so doing I echo somewhat one of the other reviews). This remark of mine will concern medium or high-carbon knives, i.e. hard knives. If one is changing the angle of such a knife, and/or perhaps is the knife is really blunt, then one needs a coarse stone, like this one. For, under those conditions, using a less coarse stone makes it hard to get the knife sharp. (Still, what counts as less coarse? Perhaps 400 grit and above. Certainly 800 grit and above. But I'm talking about standard synthetic stones here. Matters might be different with diamond stones. As to natural stones, some of them are very hard, but at least most such stones will have a grit north of two thousand, which, for the sort of work at issue, will take forever.) I would not try to use the whetstone atop its box - as shown in one of the photographs provided by the seller. I imagine that that would work badly. One needs a proper whetstone holder. For _storing_ the stone, the box is fine, though I prefer the Naniwa boxes. (Incidentally: to my knowledge, Naniwa does not do a stone in the 300-400 grit range, at least not within its more serious lines of stones.)

### ⭐⭐⭐⭐⭐ Great coarse stone
*by R***Y on 15 June 2025*

Works well. Takes down metal quickly and effortlessly, ready for the next stage. Definitely a must if you need to reprofile, thin, or correct chips etc. Or just to get a fast edge on an especially blunt knife. For a rough grit, this doesn't seem very soft, which I like. This stone should last a long time. I had an old 220G wet stone, it needed flattening after every use, didn't last long at all. Not the case here. My two cents on sharpening grits; I feel like new sharpeners are scared of coarse grits because they don't want to damage anything, so they tend to start at too fine a grit. It's important to remember the amount of material you remove to get from blunt to sharp is the same regardless of grit. The difference is how many strokes it takes you. It's not a small difference either, if you start with a blunt knife (butter knife) with a 220, 400, 1000, 3000. You could get a mirror polished, hair popping edge in about fifteen minutes, if you started with 1000 or 3000 you could genuinely be there for hours and not achieve what you want. And you would have used up a lot of expensive stone. You can get a shaving sharp edge with (skill) this stone and a strop. The finer grits get you a nice polished egde. Although I think it's generally accepted that 1000G is ideal for dressing a "not too blunt" knife.

### ⭐⭐⭐⭐⭐ Great stone
*by S***D on 29 April 2025*

Got to be the best whetstone I've bought so far (and I've bought a few). Gets my straight razor amazingly sharp very quickly. Would definitely recommend

## Frequently Bought Together

- SHAPTON K0709 Blade Blade, #320 Rough Blue Black
- SHAPTON Ha No Kuromaku Ceramic Whetstone (A-set) Medium Grit (#1000) + Fine Grit (#5000)
- Shapton K0710 Melon 8000 Blade Finishing

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-17*