---
product_id: 7892396
title: "Sharpening stone [Specialty Stone 12000 grit SP-491] NANIWA Made in Japan"
brand: "naniwa"
price: "S$9"
currency: SGD
in_stock: false
reviews_count: 9
url: https://www.desertcart.sg/products/7892396-sharpening-stone-specialty-stone-12000-grit-sp-491-naniwa-made
store_origin: SG
region: Singapore
---

# Precision 210x70x10mm size Ultra-fine 12000 grit finish Authentic Japanese craftsmanship Sharpening stone [Specialty Stone 12000 grit SP-491] NANIWA Made in Japan

**Brand:** naniwa
**Price:** S$9
**Availability:** ❌ Out of Stock

## Summary

> 🔪 Sharpen like a pro, shine like a boss.

## Quick Answers

- **What is this?** Sharpening stone [Specialty Stone 12000 grit SP-491] NANIWA Made in Japan by naniwa
- **How much does it cost?** S$9 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/7892396-sharpening-stone-specialty-stone-12000-grit-sp-491-naniwa-made)

## Best For

- naniwa enthusiasts

## Why This Product

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

## Key Features

- • **Lifetime Durability:** Thick, resilient stone designed to last a lifetime with proper care—your forever sharpening companion.
- • **Seamless Integration:** Plays perfectly with other stones in your sharpening progression for a flawless edge every time.
- • **Velvety Smooth Finish:** Experience a silky, polished edge that transforms every shave into a luxury ritual.
- • **Trusted Japanese Quality:** Crafted in Japan by Naniwa, a brand synonymous with precision and premium sharpening tools.
- • **Effortless Razor Perfection:** Achieve barber-level sharpness with minimal effort—ideal for straight razors and fine blades.

## Overview

The Naniwa Specialty Stone SP-491 is a premium 12000 grit sharpening stone measuring 8.27 x 2.75 x 0.39 inches, crafted in Japan. Designed for ultra-fine finishing, it excels at honing straight razors and delicate blades, delivering a smooth, professional edge. Its durable, thick profile ensures longevity, while its compatibility with other stones makes it a versatile addition to any sharpening toolkit.

## Description

Multiperpose stones from specialty tool to general blade.

Review: Perfect and easy for straight razors. - Love this Naniwa. It was dead flat out of the box. I needed a dedicated finisher for my straight razors and this works beautifully. I could swear this particular stone was specifically made for straights. The shave was smooth as hell from stone to leather. No CrOx or diamond spray for the first shave; I was surprised. Swarf comes right off with water or fingertips. Not cheap but it will last a long time. Polished up my pocket knife quickly too. Still aggressive at this grit so go light. Naniwas have a rep for playing well with other stones in a progression, Shaptons not so much. The Nani stones are softer than the Shaptons so I think the Shaptons will need less lapping and are more suited to heavy tooling, e.g. chisels and so on. The Naniwas are thicker, I think, so they may last longer. Sharpness is important but so is smoothness when it comes to shaving and I’m impressed with this stone already. Laps easy on wet/dry paper. No complaints. Would have been nice is a base of some sort were included since the stone is thin. I’ll live, haha. Nice velvety and milky stone. If you’re looking for a high grit, consistent finisher for straights — one that plays well with other stones — this is it. I’m no honemeister, but I found this stone easy to use. Some people may prefer natural stones, ymmv, but this is a great general finisher. I have no complaints. Overnight delivery, no chips or dings. Yeah, it’s $$$ but I doubt I’ll ever need to replace it. PS: If you find this stone grinding down quickly you are using incredible pressure. Easy does it.
Review: Great Stone - This was my first high grit stone. The highest i had before this was a 6K stone. I needed a stone to re sharpen my straight razors. I was a little nervous on buying this as there were no reviews on it yet. Im glad i bought it...worth every penny. Stone has no stand. Just came in a box with bubble wrap. Re sharpened my straight razor after a month or two of use. Scary sharp now. I think i like the Naniwa stones better now than my other stones. Measurements: 8 1/4 inch long 2 5/8 inch wide 3/8 inch thick UPDATE: I have been using this now for 8 months to hone my straight razors. It works great. Every time puts a new edge of my razor like it was professionally honed. I have put other knives to this as well with also great success. This purchase was pricey, but worth it. I leave it in the bubble wrap and the box with a rubber band to protect the rock from being dropped and cracking or hitting my other rocks. UPDATE2: Its been over a couple years now and i use this stone every month or so to hone my razor. Never had any problems with it. I still keep it in the bubble wrap and box it came in to protect it from chipping. Worth every penny UPDATE3: I have come to cherish this stone. So much that after 4 years, the box it shipped in was starting to degrade from moisture. Im always worried about the kids dropping it out of the shelf. So i made a leather pouch specifically for this stone. I have never dropped it or beat the hell out of it, but i treat it like glass while handling. Its been good to me and im sure will last me my lifetime and more

## Features

- Size: 8.27" x 2.75" x 0.39" (210x70x10mm)
- Grid: #12000
- Made in Japan

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MJ89E5S |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 4.4 4.4 out of 5 stars (80) |
| Date First Available | November 14, 2013 |
| Grit Description | Extra Fine |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 9.6 ounces |
| Item model number | SP-491 |
| Manufacturer | NANIWA ABRASIVE |
| Material | WA |
| Part Number | SP-491 |
| Product Dimensions | 8.27 x 2.76 x 0.39 inches |

## Product Details

- **Brand:** Naniwa
- **Grit Type:** Extra Fine
- **Manufacturer:** NANIWA ABRASIVE
- **Material:** WA
- **Product Dimensions:** 8.27"L x 2.75"W x 0.39"H

## Images

![Sharpening stone [Specialty Stone 12000 grit SP-491] NANIWA Made in Japan - Image 1](https://m.media-amazon.com/images/I/61FCNkGALGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect and easy for straight razors.
*by J***A on May 3, 2018*

Love this Naniwa. It was dead flat out of the box. I needed a dedicated finisher for my straight razors and this works beautifully. I could swear this particular stone was specifically made for straights. The shave was smooth as hell from stone to leather. No CrOx or diamond spray for the first shave; I was surprised. Swarf comes right off with water or fingertips. Not cheap but it will last a long time. Polished up my pocket knife quickly too. Still aggressive at this grit so go light. Naniwas have a rep for playing well with other stones in a progression, Shaptons not so much. The Nani stones are softer than the Shaptons so I think the Shaptons will need less lapping and are more suited to heavy tooling, e.g. chisels and so on. The Naniwas are thicker, I think, so they may last longer. Sharpness is important but so is smoothness when it comes to shaving and I’m impressed with this stone already. Laps easy on wet/dry paper. No complaints. Would have been nice is a base of some sort were included since the stone is thin. I’ll live, haha. Nice velvety and milky stone. If you’re looking for a high grit, consistent finisher for straights — one that plays well with other stones — this is it. I’m no honemeister, but I found this stone easy to use. Some people may prefer natural stones, ymmv, but this is a great general finisher. I have no complaints. Overnight delivery, no chips or dings. Yeah, it’s $$$ but I doubt I’ll ever need to replace it. PS: If you find this stone grinding down quickly you are using incredible pressure. Easy does it.

### ⭐⭐⭐⭐⭐ Great Stone
*by M***R on December 30, 2014*

This was my first high grit stone. The highest i had before this was a 6K stone. I needed a stone to re sharpen my straight razors. I was a little nervous on buying this as there were no reviews on it yet. Im glad i bought it...worth every penny. Stone has no stand. Just came in a box with bubble wrap. Re sharpened my straight razor after a month or two of use. Scary sharp now. I think i like the Naniwa stones better now than my other stones. Measurements: 8 1/4 inch long 2 5/8 inch wide 3/8 inch thick UPDATE: I have been using this now for 8 months to hone my straight razors. It works great. Every time puts a new edge of my razor like it was professionally honed. I have put other knives to this as well with also great success. This purchase was pricey, but worth it. I leave it in the bubble wrap and the box with a rubber band to protect the rock from being dropped and cracking or hitting my other rocks. UPDATE2: Its been over a couple years now and i use this stone every month or so to hone my razor. Never had any problems with it. I still keep it in the bubble wrap and box it came in to protect it from chipping. Worth every penny UPDATE3: I have come to cherish this stone. So much that after 4 years, the box it shipped in was starting to degrade from moisture. Im always worried about the kids dropping it out of the shelf. So i made a leather pouch specifically for this stone. I have never dropped it or beat the hell out of it, but i treat it like glass while handling. Its been good to me and im sure will last me my lifetime and more

### ⭐⭐⭐⭐⭐ Worth the money, not for rookies
*by B***R on January 19, 2020*

This stone is capable of sharpening multiple types of steel. I have used it to sharpen all of my various kitchen knives, my hunting and utility knives, and after enough practice on it, my straight razor. I highly recommend getting a smaller leveling stone to help start a mud on the stone, and if you do get one, make sure you dedicate it to this stone because the small grit should not be mixed with thicker grit granules. Awesome stone, I want a second one to keep in my knife sharpening stone kit in case something happens to my current one.

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-25*