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JCK Original Kagayaki CarboNext Limited, KC-SP Large Extra Wide Gyuto 270mm (KOMAGIRE, 10.6 inch)

Availability: Normally ships the same day

Our innovative KAGAYAKI CarboNext product range uses a next generation carbon tool steel that we call “CarboNext”. Our CarboNext blades allow you to enjoy all the usual advantages of traditional high carbon steels (i.e.: Excellent edge sharpness, excellent edge retention and ease of sharpening), but they offer the additional benefit of improved rust resistance.

The blade is made of solid CarboNext special high carbon tool steel that is hardened to HRc. 59-61. The knife features superb fit and finish, full tang construction and a comfortable Rosewood handle. Its thin blade has a slow gradual taper and is finely ground, which results in excellent cutting performance and blade balance.
Because CarboNext knives offer greater rust resistance and ease of maintenance than regular high carbon steel knives, we particularly recommend them to first-time users of carbon steel knives. Professionals and serious amateurs will love their superb blade geometry, cutting performance and quality construction.

Recently, the craftsmen who make our CarboNext knives, Team Gotoh, found a small batch of long discontinued blades called KOMAGIRE. These Large, Extra Wide / Tall Gyuto 270mm blades were originally used for making a special butcher’s knife, but Team Gotoh has used these rare blades to create a small batch of limited edition CarboNext Special Gyuto knives for JCK.

A limited quantity of these Special Gyuto knives are now available (25 pieces total). If you are a professional chef who regularly processes meat, or a professional butcher who needs a real workhorse knife, we highly recommend these Gyuto.

The Gyuto is the Japanese version of the classic Western Chef’s knife. It can be used with a variety of different cutting techniques to achieve a wide range of kitchen tasks and is suitable for cutting the vast majority of meats, fish, vegetables and fruits. The Gyuto is a true multi-purpose knife.

    Knife Model: JCK Original CarboNext Limited, Large Extra Wide Gyuto 270mm (KOMAGIRE, 10.6 inch)

    Blade Material:  CarboNext (Next generation of Carbon Tool Steel material)

    Rockwell Hardness (HRc): 59 to 61

    Blade Grind and Edge Shape: Double Bevel Edge 70/30

    Handle Material: Rose Wood Handle

    Saya Included: No.

    Gyuto 270mm (10.6")
    Cutting edge length: 275mm (10.8")
    Total Length: 400mm (15.7")
    Blade Thickness: 2.4mm (0.09")
    Blade Width: 70mm (2.7")
    Handle Length: 123mm (4.8")
    Total Weight: 322g (11.5oz)



    Master Craftsman modifies edge shape and bevel for left hand use by hand sharpening process at the following additional cost:

    • Petty + US$6
    • Santoku, Gyuto + $10

    Left handed versions are normally in stock for immediate shipping. However, when it became out of stock, please allow 3 to 6 days for shipping.

    For your information, many of the Japanese Kitchen knives come originally with double bevel edge sharpened 70/30 (face side/back side) for Western style knives. This geometry came from Japanese Traditional knives with single bevel edge and Shinogi blade construction. This is one of the special features and reasons why Japanese knives have an excellent cutting performance.

    However, this 70/30 edge geometry is designed for right hand use, so we have a service to modify it to 30/70 for left handed users with re-sharpening process by skilled craftsman.

    Information About The Care & Maintenance of CarboNext Knives
    While our CarboNext knives have better rust resistance than other plain carbon steel knives, they will discolor and rust if not cared for properly. To keep your knife in good condition, please do not leave it in wet or salty conditions for a long time. After hand washing the knife, we recommend that you carefully rinse the knife with plain warm water and dry it with a clean cloth. It is important to make sure that there is no water left between the blade tang and the handle, or bolster, because this can lead to corrosion. 

    We believe the quality and cutting performance of Japanese knives are the best in the world, and hope you enjoy fine craftsmanship and sharp edge with your new knife. With proper cares, every Japanese knife should be your special cooking partner for long times.



    This is the Carbon steel blade kitchen knife that can get rust and discolor easily, and requires extra care and attention to prevent rust. 

    • Please do not put the knife in the dishwasher machine for cleaning.
    • Please do not leave the knife in water or wet condition for long time.
    • After using, please hand wash the blade, bolster and handle thoroughly, and wipe it clean and dry with soft clothes. Please apply Tsubaki oil on the blade and keep it in dry place.
    • This is an extremely sharp knife. Please use special cares in using and storing it.
    • Unlike German made knives, Japanese knife blades are ground to thin cutting edge for sharper cutting and easier re-sharpening. Please protect the edge from hitting hard materials to avoid chipping or cracking.
    • Please do not use it to cut bone or frozen foods, any hard shell foods such as lobster and crab.
    • We recommend using Japanese whetstones to re-sharpen the knife, when it gets dull.
    Customer Reviews
    4.9 Based on 70 Reviews
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    Filter Reviews:
    Hansol B.
    United States United States
    I recommend this product
    I will give 4.5. I bought this 270mm knife for fish.

    I am a chef and have 5 years experience in casual and fine dining kitchen. Generally it is very good for western kitchen. very sharp. I bought this for cutting big fishes. Generally it is good but knife edge doesn't last for long time as Carbonsteel knife. you should sharpen your knife quite often to trimming fish.

    Benjamin W.
    Germany Germany
    I recommend this product
    Very good knife

    I am really happy with the knife. Build quality is excellent. The knife feels really good, even in my big hands. I am 192cm tall. Sharpness out of the box was also great and is still very good. This is my first good knife and I just regret not having bought it earlier.

    Matthias H.
    Germany Germany
    I recommend this product
    Very happy customer, great knife & service

    After the German customs delayed my shipment (and JCK was so nice to provide me the bill via mail on short notice to speed up the process) I was finally able to test my new knife over one week. And... drum-roll... the CarboNext Gyuto 210mm is just amazing. Although I had the feeling that I needed to adjust my cutting technique to get the best out of the one-sided-geometry of the edge I got more and more impressed by the knifes performance. I was also impressed that the knife was delivered in a good looking box where it can be stored safe and dry. Overall I can summarize Product: 5 Stars Service: 5 Stars I'm looking forward to buy another product in the near future.

    Matthias Heite verified customer review of JCK Original Kagayaki CarboNext Series Gyuto (180mm to 270mm, 4 sizes)
    Paweł M.
    Poland Poland
    I recommend this product
    My first proper knife

    After many years of cutting with some blades I am too ashamed to talk about I finally bought this knife as my first proper one. And I do not regret it, it is a great improvement!

    william b.
    United States United States
    I recommend this product
    Kagayaki CarboNext

    my wife loves it

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