The world of Japanese knives can be intimidating, so we've created a simple glossary for frequently used terms and industry jargon to make things easier.
The quintessential knife for slicing pritsine cuts of Sashimi, the blade is long and thin, usually with only an edge on the right hand side of the blade.
Similar in appearance to a boning knife but usually more flexible and ideal for trimming up meat or filleting fish.
General Knife Terms
Carbon Steel
Carbon Steel is in its base form a combination of Iron and Carbon. Carbon Steels incorporate many other elements but won't be rust resistant.
Stainless Steel
Steel that has Chromium, Nickel or another element that helps in corrosion resistance.
Damascus Steel
In Japanese knives, Damascus refers to the pattern on the outer layers of the blades. Usually resembles water, ink, or other intricate patterns.
San-Mai
San-Mai means 3 layers, and in Japanese knives refers to a blade that has 3 layers of steel fused together.
Warikomi
The process of splitting a bar of hot iron and inserting a high grade steel, then forging together. Making a sharp edge with soft outer layers.
Honyaki
The technique of Oil or Water Quenching Blades to make them extremely hard. Usually Honyaki blades are reserved for the most experienced chefs.
Suminagashi
In the Sakai region, "Suminagashi" refers to the flowing ink pattern on kitchen knives. Similar to Damascus.
Kurouchi
Kurouchi is the black finish left partially on some Japanese Knives. It helps to prevent corrosion and also adds a unique appearance.
Kasumi
Kasumi finish is Japanese technique of finishing that leaves a hazy almost cloud like finish on the blade. This is produced using natural stones.
Tsuchime
Tsuchime is a hammered finish. The craftsman will leave hammer marks in the blade for aesthetics and to help reduce drag.
Nashiji
This finish is designed to appear like the skin of Japanese pears.
Mirror
As the name suggest this is Mirror finish, which requires a high level of skill and time from the polisher.
Billet
A piece of raw steel used to forge a blade from.
A forge (Noun)
A high heat oven or fire pit, made with either gas or charcoal to heat up steel for forging.
Quench
When a steel is heated and then dunked into water or oil to cool. This causes the steel to harden.
Normalize
Releasing pressure in steel that has been quenched by heating it back up and allowing it to cool slowly.
Temper
Baking the steel to a particular temperate to achieve as specific hardness or durability and ensure there is no further stress in the blade.
Forge (Verb)
To make a knife by heating it and repeatedly hammering it either by hand or power hammer into a knife shape.
Forged Blade
A blade made by the process explained above.
Forge Welded
Multiple pieces of steel heated and fused together into one uniform piece.
Whetstone
A synthetic or natural stone used to polish or sharpen a knife.
Grit
The strength of a whetstone or sandpaper in relation to how much material it will remove from a knife.
Double Bevel
Western knives will always have a double bevel, essentially the edge is on both sides of the blade.
Single Bevel
Traditional Japanese knives only have 1 single edge on the blade while the opposing side is usually flat or slightly concave.
Tang
The end of a blade that extends into the handle.
Bolster
A thick part of a knife that sits in between the blade and the tang. It is there for added strength and many people use it for additional grip.
Stamped Blade
A blade that has been cut from a sheet of thin steel as opposed to hammered out of a block of steel.
Rockwell
A measurement system designed to grade material hardness. In the case of knives a higher number means the steel is harder. For example, German chef knives usually rate 53-58 Rockwell Hardness and Japanese Knives range from 56-62 Rockwell Hardness. Note that it does not necassarily mean a better knife due to being harder. It depends on the knives intended use and other properties.
Yanagiba Sashimi Knives
Gyuto Chef Knives
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