Shapton Kuromaku – Sharpening Stones
SHAPTON Kuromaku – Japanese sharpening stones for complete edge care
Colour-coded water stones ranging from coarse grits for repairs to ultra-fine stones for final polishing. Fast sharpening performance, hard construction and use without prolonged soaking.
SHAPTON Kuromaku, also known as Ha-No-Kuromaku, are Japanese synthetic water stones for precise sharpening of kitchen knives, Japanese blades and suitable craft tools. Each grit has its own colour, making the individual stages easy to identify even when assembling a multi-stage sharpening set.
The range includes stones from the very coarse JIS #120 grit for demanding repairs, through the versatile #1000, up to the ultra-fine #12000 stone. You can therefore create a progression tailored precisely to the condition of the edge and the desired result.
Kuromaku stones are characterised by fast material removal, high hardness and slower hollowing. They generally do not require prolonged soaking – simply wet the working surface with water. The plastic case makes storage easier and can also be used as a basic stand.
#ShowMore#
Why choose SHAPTON Kuromaku?
Quick grit identification
Each stone has a characteristic colour. During sharpening, you can immediately tell whether you are holding a coarse repair stone, a basic sharpening stone, a refining stone or a polishing stone.
No prolonged soaking
Thanks to their low water absorption, sharpening can begin almost immediately after wetting the surface. The stones are therefore well suited to regular home and professional maintenance.
Hard and stable sharpening surface
Compared with softer water stones, Kuromaku stones generally hollow more slowly. Their flatness must still be checked and the stone flattened when required.
A range for the complete sharpening progression
The individual grits cover repairs, creating a new edge, regular maintenance, fine finishing and specialised polishing.
Which SHAPTON Kuromaku grit should you choose?
| Grit and colour | Main use | When to choose it | Product |
|---|---|---|---|
| #120 – white | Very coarse repairs and high material removal | Deeper damage, geometry changes and demanding repairs for more experienced users | View #120 › |
| #220 – moss green | Coarse edge restoration | Very dull knives, chips in the edge or creating a new bevel | View #220 › |
| #320 – blue-black | Repairs and preparation before #1000 | Significantly dull edge, small chips or adjusting the sharpening angle | View #320 › |
| #1000 – orange | Basic sharpening | The most versatile first stone for normally dull kitchen knives | View #1000 › |
| #1500 – blue | Finer working edge | Standalone maintenance or a smoother transition between #1000 and a finer stone | View #1500 › |
| #2000 – green | Refining and smoothing the bevel | After #1000 or as a fine working finish for a regularly maintained knife | View #2000 › |
| #5000 – wine red | Fine finish | A smoother cut for quality kitchen and Japanese knives | View #5000 › |
| #8000 – melon | Very fine finishing | Precise cuts with harder and thinner blades after previous sharpening stages | View #8000 › |
| #12000 – yellow | Specialised final polishing | Ultra-fine finishing for experienced users, suitable razors and precision tools | View #12000 › |
A simple recommendation for your first purchase
If you are buying only one stone, begin with #1000. Add #320 for repairing a very dull or damaged edge. Continue with #2000 for a finer kitchen edge, and choose #5000 or #8000 for a smooth finish on quality Japanese knives.
Recommended stone combinations
A foundation for the home kitchen: #1000
One versatile stone for regularly restoring normally dull kitchen knives. The best starting choice for a beginner.
A practical pair: #1000 + #2000
The #1000 stone creates a new working edge and #2000 smooths and refines it. A suitable set for most quality kitchen knives.
Repair and maintenance: #320 + #1000 + #2000
A complete working progression for repairing a significantly dull knife, creating the bevel and then refining the cutting edge.
For Japanese knives: #1000 + #2000 + #5000
A balanced set for creating the edge, refining it and smoothly finishing harder and thinner kitchen blades.
Ultra-fine finish: #1000 + #5000 + #8000
A set for more experienced users who want a precise and very smoothly finished edge. The #8000 stone is not intended as the first stage for a dull knife.
Who are Kuromaku stones suitable for?
- home cooks who want to maintain quality knives themselves,
- professional cooks and more experienced sharpeners,
- Japanese and European kitchen knives,
- stainless, carbon and harder knife steels,
- suitable chisels, plane blades and other craft tools,
- users who want fast use without prolonged soaking.
How to use SHAPTON Kuromaku correctly
- Choose the grit according to the condition of the edge. Use a coarse stone only when greater material removal is genuinely required.
- Wet the working surface. Kuromaku stones do not need prolonged soaking.
- Ensure a stable position. Use the case as a basic stand or a suitable non-slip holder.
- Maintain a consistent angle. Respect the knife’s original geometry and work without excessive pressure.
- Create a continuous burr. Inspect the entire edge before changing sides or moving to a finer stone.
- Rinse everything between stones. Coarser particles must not contaminate the finer sharpening surface.
- Clean and dry the stone after use. Place it in the case only after it has dried completely.
Important notice
Coarse stones #120, #220 and #320 remove material very quickly. Use them only for repairs or significantly dull edges. In contrast, #8000 and #12000 are intended only for finishing an edge already created on lower grits. None of these stones is intended for sharpening ceramic knives.
Kuromaku, RockStar or GlassStone?
| SHAPTON range | Characteristics | When to choose it |
|---|---|---|
| Kuromaku | Colour coding and a practical plastic case | You want a clear and versatile range for home and advanced sharpening |
| RockStar | Premium range with fast sharpening and polishing performance | You want professionally oriented stones or a complete sharpening set |
| GlassStone | Low-profile sharpening stone on a solid glass backing | You prefer precise professional construction on a glass base |
Other premium stones can be found in the SHAPTON RockStar category.
Care of Kuromaku sharpening stones
After every sharpening session, rinse away the sharpening slurry and metal particles. Allow the stone to dry naturally at room temperature and only then place it in the case. Do not dry the stone on a heater or in direct sunlight, and do not leave it submerged in water for prolonged periods.
Check the flatness of the sharpening surface regularly. As soon as the stone becomes hollow in the centre, flatten it with a suitable flattening tool. All holders, cleaning tools and accessories can be found in the sharpening accessories category.
Learn the correct sharpening progression
During our practical course, you will learn how to choose the correct grit, maintain a stable angle, create a burr and move safely between individual stones.
Need help assembling your own sharpening set?
Contact us by phone at +420 702 049 048, Monday to Friday between 7:30 and 16:00. Based on the knife type, steel and condition of the edge, we will recommend a suitable combination of grits.
Frequently asked questions
Which SHAPTON Kuromaku should I choose first?
The most versatile first choice is the orange #1000 stone. It is suitable for basic sharpening of normally dull kitchen knives.
Do Kuromaku stones need to be soaked in advance?
Prolonged soaking is unnecessary. Wet the working surface with water and maintain a water film on it during sharpening.
When should I use the #320 stone?
Use it for a significantly dull edge, smaller chips, bevel adjustment or as a repair stage before the #1000 stone.
What is Kuromaku #2000 used for?
It is used for refining after #1000, smoothing the bevel and creating a fine kitchen edge that still retains practical cutting performance.
Is Kuromaku suitable for Japanese knives?
Yes. The stones are also suitable for many harder Japanese steels. It is important to choose the correct grit and respect the geometry of the edge.
Can I use only a fine #5000 or #8000 stone?
Only when the edge has already been formed correctly and requires only fine finishing. Sharpen a dull knife first on a grit around #1000.
Can ceramic knives be sharpened on these stones?
No. Ceramic blades require sharpening media designed specifically for ceramic material.
What is the plastic case used for?
It protects the stone during storage and can also be used as a simple stand during sharpening.
How often does the stone need flattening?
It depends on the frequency of use, pressure and the tool being sharpened. Flatten it whenever the working surface is visibly or noticeably hollow.
How should the stone be stored correctly?
After sharpening, rinse it, allow it to dry completely at room temperature and only then place it in the case.
Product sorting
List of products
Shapton Kuromaku JIS 1000 Sharpening Stone is a high-quality Japanese stone designed for regular maintenance and sharpening of kitchen knives. You can recognize the K0702 model...
Japanese sharpening stone from the colour-coded stone series SHAPTON Kuromaku. Each colour represents a different grit according to the Japanese JIS standard. The practical...
Japanese sharpening stone from the colour-coded stone series SHAPTON Kuromaku. Each colour represents a different grit according to the Japanese JIS standard. The practical...
Japanese Whetstone from the colour-coded SHAPTON Kuromaku series. Each colour represents a different grit according to the Japanese JIS standard. The practical plastic case...
Sharpening stone from the SHAPTON Kuromaku series of colour-coded Japanese stones. Each colour represents a different grit according to the Japanese JIS standard. The practical...
Sharpening Japanese whetstone from the colour-coded whetstone series SHAPTON Kuromaku. Each colour represents a different grit according to the Japanese JIS standard. The...
Sharpening stone from the SHAPTON Kuromaku series of colour-coded Japanese stones. Each colour represents a different grit according to the Japanese JIS standard. The practical...
Japanese sharpening stone from the colour-coded SHAPTON Kuromaku series. Each colour represents a different grit according to the Japanese JIS standard. The practical plastic...
Listing controls
Kuromaku stones are available in a wide range of grits, from coarse to very fine, allowing for both coarse grinding and fine finishing. Typical grit sizes include 120, 220, 320, 1000, 2000, 5000, 8000, and 12000. These stones are made from premium abrasive materials, ensuring long life and consistent sharpening results.