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Birch & Bevel

Honyaki Gyuto

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Honyaki kitchen knives are forged using a technique most similar to that used in the forging of Japanese katana. The technique was developed to improve the strength and sharpness of the swords. Honyaki are forged from high carbon steels using a variable hardening technique that involves the application of a special clay to the spine of the blade before it is quenched. This process leaves the blade with a soft, resilient spine, a hamon (or temper line), and hard, sharp edge.

Honyaki kitchen knives are highly sort after by collectors and enthusiasts due to the exceptional beauty of the hamon and because of the high level of skill required to produce these knives. Even the most talented of blacksmith will have up to 30% of their blades fail. It is for this reason that we are only able to produce the Birch and Bevel Honyaki Gyuto series in the smallest of quantities.

Our Honyaki Gyuto's are forged with a tapered spine and ground Walkschliff, a grinding technique that is done by hand and requires a huge amount of skill. The Walkschliff grind is characterized by the thickest part of the blade being situated bellow the spine. So, the spine is thinner than the overall blade. This oval shape provides a high level of stability, improved cutting performance and an extremely thin and finely ground cutting edge.

1. Specifications

Blade Type: Gyuto

Edge Length: 230mm | 250mm

Spine Width - Heel: 3.6mm | 3.6mm

Spine Width - Mid: 2.2mm | 2.2mm

Spine Width - Tip (20mm before): 1mm | 1mm

Blade Height: 55mm | 57mm

Weight: 177g | 211g

Cutting Edge Steel: 26C3 "Spicy White"

Stainless: No

HRC Rockwell: 64

Blade Construction: Honyaki Mono Steel

Blade Finish: Satin Polish

Grind: Walkschliff

Handle Construction: Hidden Tang

Handle Materials: Oak, Birchbark, Brass

Handedness: Ambidextrous

Saya Included: No

2. Care Instructions


Cleaning: Clean by hand with warm water. Avoid wetting the
 handle when possible. 

Sharpening: We advise using whetstones to sharpen your knives. Over time you will get to know when your knives need to be sharpened, but with daily home use you will likely need to sharpen them once every 3-4 months. Using a honing rod or steel to maintain your bevel between sharpening will help.

Reactive steels: Reactive steels like Aogami Super, Apex Ultra or 1.2419 German tool steel are susceptible to rust if not properly cared for. In this case we advise that you keep knives dry between uses and when storing the knife for longer periods wiping the knife blade with Tsubaki oil or another food safe oil is a wise choice. This will not stop a patina
forming on the blade, but it will stop rust. A patina can be a beautiful personal feature on your knife and helps to stop rust forming. So, dry your knife regularly between uses, store in a dry place and apply some Tsubaki oil from time to time when storing for long periods. 

Caring for your knife handle: Your Birch and Bevel kitchen knife has an oak, birch bark and brass handle, which we have treated 
with a protective oil, but over time this will wear away. You can apply 1 or 2 drops of boiled linseed oil or Tru oil if you can find it. Natural bees wax or another food safe wax can be applied in addition.

Never apply hot wax or oil as you risk warping or damaging the handle.

Usage: Although your Birch and Bevel kitchen knives are made from the best steel available, heat treated and hardened using best in class techniques, it should be mentioned that these knives are designed for culinary use and not meant to be used to cut hard materials like bone or frozen produce. 

    Honyaki Gyuto
    Honyaki Gyuto
    Honyaki Gyuto
    Honyaki Gyuto
    Honyaki Gyuto
    Honyaki Gyuto