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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
    4.8 Based on 11 Reviews
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    Filter Reviews:
      Martin O.
      United States United States
      I recommend this product

      CarboNext Extra Wide Gyuto

      I had this knife in my wish list for a while so as soon as I got the notification in my e-mail that it was back in stock I quickly bought it. Shipping was fast and the knife was very sharp out of the box. I have been using this knife at home for a month now and it still has its edge. I am used to using vegetable cleavers so the extra height I get from this gyuto is perfect. I highly recommend this knife!

      JapaneseChefsKnife.Com JCK Original Kagayaki CarboNext Limited, KC-SP Large Extra Wide Gyuto 270mm (KOMAGIRE, 10.6 inch) Review
      Pete D.
      United States United States
      I recommend this product

      My go to prep knife.

      After using this knife for a couple of months, I can't imagine going back to an average sized knife. I had to use my old 210mm Shun the other day and it felt so puny. More importantly, it can only handle about half the product at one time as this beast. For professionals looking to save time, big knives are a must. The extra size and mass makes for nice clean and accurate cuts as well. This knife is simple to sharpen and the edge holds for as long as can be expected for a blade this thin. I decided to keep the 70/30 grind and it works great. My only issue with this knife is that while it NEVER rust, it does stain and, unlike normal carbon steel, I can't polish the stains away. Over time the stains sort of combine to form a patina but the stains are permanent.

      JapaneseChefsKnife.Com JCK Original Kagayaki CarboNext Limited, KC-SP Large Extra Wide Gyuto 270mm (KOMAGIRE, 10.6 inch) Review
      Pedro C.
      Brazil Brazil
      I recommend this product


      Excellent workhorse knife!

      A JapaneseChefsKnife.Com Customer
      Julian B.
      Australia Australia
      I recommend this product

      Great workhorse

      Bought this out of curiosity because it looked awesome. It's ended up as my main knife in the kitchen. The heel was a bit rough at first but with a bit of work on the stone that was easily fixed. Great value knife!

      Alejandro P.
      United States United States
      I recommend this product

      Love knives

      beautiful knife to work all day

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