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Komon

NAKAYAMA, KOPPA

NAKAYAMA, KOPPA

No.251001-naka
¥20,000 JPY
¥20,000 JPY
Sale
Shipping calculated at checkout.

Available From: April 12, 2026 10:00 (JST)

AREA : Kyoto

MINE : Nakayama

LAYER : Tomae

REFERENCE GRIT : 8,000-10,000 Grit

SIZE : W120/106/47mm, L152.7mm, H23.6mm

INTERPRETATION OF THE STONE

A very nice Nakayama Koppa with strong fast cutting speed and a very fine finish for both polishing and edge. Very easy to use with excellent feedback works very well on its own but if looking for a thicker Kasumi finish on soft iron, it's recommended to dress the stone surface with a 600 grit Atoma.

It’s a soft fine Nakayama that works very well for both kitchen knives and Japanese tools, though it's a Koppa the entire surface area can be used with ease and great results.

Black swarf is produced immediately after a few strokes, the stone was tested on Tanaka forged kitchen knives from white to blue steel as well as vintage carbon, both single and double bevel knives. Performed well across all steel from Hitachi carbon steels from Tanaka with excellent results.

RECOMMENDED USE FOR :

Final polish of kitchen knife and Japanese tools, Edge finishing

MATERIAL
◻︎ Carbon Steel
◻︎ Tamahagane
◻︎ Wrought Iron
◻︎ Watetsu & Soft Iron Cladding
FORGING STYLE
◻︎ Honyaki
◻︎ Sanmai
◻︎ Damascus
BLADE TYPE
◻︎ Double Bevel Knife
◻︎ Single Bevel Knife
◻︎ Woodworking Tool
PROCESS
◻︎ Kasumi Finish (Polishing)
◻︎ Fine Detail Finish (Polishing)
◻︎ Edge Sharpening
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Prepared for Use

Komon does more than simply select workable natural stones.
Even the finest natural stone cannot be used for sharpening straight from the mountain. Each stone must be carefully prepared and finished before it is ready for use.

At Komon, each stone is carefully prepared and finished by craftsmen with extensive experience and knowledge of natural stones, so that its qualities can be experienced from the moment it is put to use.

  • A STABLE BASE

    We carefully flatten the back side to ensure stability during sharpening. When additional support is needed, we attach a wooden base to create a secure foundation.

    Any wobbling of the stone affects the precision of the sharpening process; stability is particularly crucial during final polishing and edge sharpening.

  • A READY-TO-SHARPEN SURFACE

    The sharpening surface is flattened and prepared for use.
    Softer stones intended for polishing and finishing are given generously rounded edges. Harder stones used for edge sharpening are also carefully rounded to prevent the stone from damaging the blade.

    As a natural stone is used, new layers of stone will gradually appear. Regular flattening and maintenance are therefore essential to keep the stone performing at its best.

  • PROTECTING THE STONE FOR YEARS TO COME

    Natural stones are formed by nature, and some may contain weaknesses that could eventually develop into cracks.
    We identify these stones in advance and, when necessary, reinforce the surrounding areas with cashew resin to help prevent future damage.

    Cashew resin can scratch a blade. Before use, any exposed cashew resin on the corner should be carefully rounded with a medium grit diamond plate.

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Kasumi Powder 50g　霞粉（包丁研磨剤）

¥3,000 JPY
¥3,000 JPY
Sale Sold out
Shipping calculated at checkout.
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Diamond Stone for Professional Sharpeners

Excellent foundation stones for working with natural stone, these NSK Kogyo stones feature precise grain sizes and superior cutting speed.

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