There is no single standard for this; in this article the terms are used as they are commonly understood in knife making. The aim is to define the colloquially used categories “Japanese” and “European” in such a way that kitchen knives can be meaningfully distinguished and compared. There are European kitchen knives that are ground extremely thin, and Japanese kitchen knives that are deliberately made thick and robust.
Many traditional Japanese knife forms were built rather stoutly, for example the Deba. Gyuto and Santoku, by contrast, are relatively recent developments that only became widespread under Western influence. The modern idea of a particularly sharp, thin “Japanese” kitchen knife therefore primarily describes a modern geometry trend.
What distinguishes the “Japanese” from the “European” kitchen knife grind?
For geometry, the immediate perception of sharpness is mainly determined by the thickness behind the edge and the edge angle. The blade thickness at the spine primarily contributes to stiffness and reserves under lateral load. Blade thickness usually plays a smaller role in cutting feel than the blade grind itself.
Geometry at a glance
The following differences are typical target values from practice and serve as guidelines for kitchen knife geometries.
Japanese kitchen knives
- Blade grind execution: usually to approx. 0.08–0.20 mm
- Edge angle: typically 10–15° per side (20–30° total).
- Distal taper: often clearly pronounced, more flexible tip.
- Hardness: usually hardened somewhat higher.
- Character: very eager to cut, clearly defined use case.
European kitchen knives (Western style)
- Blade grind execution: usually to approx. 0.18–0.40 mm
- Edge angle: typically 15–20° per side (30–40° total).
- Distal taper: often less pronounced, overall stiffer.
- Hardness: often hardened somewhat lower, forgiving in everyday use.
- Character: robust, less sensitive, broad range of applications.
Blade grind execution: Here refers to the geometry in the lower blade area (“how thin it is ground”), especially the thickness before the actual edge is set. This area largely determines how easily the knife pulls itself into the material and how strongly it wedges.
Distal taper: Describes the tapering of the blade toward the tip. A more pronounced distal taper provides a finer, lighter tip and influences the cutting and guiding behavior, especially in the front section of the blade.
These values serve as rough reference points to give knifemakers and users an idea of the typical geometry ranges. As a rule, for kitchen knives (chef’s knives, Santoku, Gyuto, vegetable knives, …) flat grinds (V-grinds) or hollow grinds are used.
Different steel requirements
These numbers make it clear that shallower angles and thinner geometry in combination significantly change the demands placed on the steel. A Japanese geometry requires higher edge stability and at the same time sufficient toughness. A fine microstructure is important here, as well as sufficiently high hardness, while brittleness must not become excessive.
If the steel has too little edge stability, the edge rolls (the cutting edge folds over);
if it has too little toughness or chip resistance, the edge tends to chip.
Both a rolled edge and micro-chipping make the blade noticeably duller, because the edge loses its clean, continuous geometry.
A rolled edge often feels duller, but it can frequently be reset by typical steeling or stropping.
Chipping – i.e. micro-chips – is less of an issue in slicing cuts (the edge still has good “bite”) than in push cuts, where cutting quality and sharpness suffer more.
Note: Hardness (HRC) is only one part of edge stability. Alloy, steel quality and the specific heat treatment (microstructure quality)
have a strong influence on these properties.
For thin grinds, carbon steels with a carbon content of around 1 % or more are often used, since many of these steels can meet the requirements. For stainless variants, the field is somewhat more limited, but there are high-alloy steels such as AEB-L, Nitro-V or powder-metallurgical steels like RWL34 and Vanax which can meet these requirements and are also corrosion-resistant.
The examples mentioned here are therefore intended as guidelines. In our shop we provide concrete recommendations in the respective steel descriptions as to which knife types a steel is suitable for.
Conclusion
For the geometry of “Japanese kitchen knives”, the requirements for steel and heat treatment are generally higher than for “European kitchen knives”. Exceptions and hybrid geometries prove the rule.
Grind height on kitchen knives
For the direct cutting feel, a lower wedging effect is usually advantageous, especially with fine vegetables and soft food, because the knife glides more smoothly through the material and builds up less resistance. However, this is highly subjective; not everyone prefers very thin blades with very fine grinds.
When cutting deeper into firm, compact material than the grind height reaches, the wedging effect can become noticeably stronger. This is especially the case with more robust kitchen knives with a low grind height. With softer materials such as meat or fish, this effect is much less pronounced, because the material yields to the sides. Very thinly ground blades can therefore be perceived as very eager to cut in everyday use even with a comparatively low grind height.
Flat grind on kitchen knives
The higher the grind is pulled up, the lower the wedging effect in the cut. To obtain a more robust blade, the grind can either be kept lower or ground overall less thin.
Hollow grind on kitchen knives
For a hollow grind, it is the combination of the radius of the hollow and the grind height.
If a hollow grind with a large radius is pulled high, the wedging effect decreases, similar to a high flat grind.
With a lower hollow grind and smaller radius, it is often enough to pull the hollow only about 1–2 cm up to make the area directly behind the edge very thin.
Above this area, more material remains, so the blade feels overall more robust and less flexible.
High, flat blade faces can cause certain foods, such as potatoes, to stick more to the blade. This can also be influenced by surface finish: a fine satin finish usually sticks less than a mirror polish. In addition, there are grinding and surface variants such as kullenschliff (granton edge), holes in the blade (cheese knives), hammer-forged or forged finishes to reduce this effect. A lower grind with a clear transition line can also improve how well food releases from the blade.
Adjusting geometry by regrinding the edge bevel
A “Japanese-style” kitchen knife can usually be made more robust by regrinding the edge bevel, for example from 10–14 degrees per side to 16–20 degrees per side, to make the edge less sensitive.
Conversely, a typical European kitchen knife can only be made more eager to cut to a limited extent. An edge angle of, for example, about 10–12 degrees per side requires that steel and heat treatment are designed for this. On many European kitchen knives, such a regrind would quickly lead to a pronounced tendency to roll in everyday kitchen use. Additional thinning of the primary grind is usually only moderately sensible and often only possible to a limited extent, depending on steel and hardness, but in individual cases it can certainly be done.
Hybrid forms on hand-made kitchen knives
Especially in the field of hand-made and hand-forged kitchen knives, there are numerous hybrid forms between Japanese and European geometries. European blade shapes are combined with very thin, Japanese-style grinds and, for everyday usability, often given larger edge angles. Likewise, Santoku or Gyuto shapes are used with a bit more thickness and/or not quite as shallow edge angles. Many custom knives are intentionally designed to sit between the two geometries, depending on the user’s needs and the maker’s skill and preferred working methods.
The delicate “Japanese kitchen knife grinds” and high flat grinds are also more demanding to produce and forgive
fewer mistakes. This is one reason
why hand-made knives, depending on the maker’s experience and working style, vary greatly in how far they push in this direction.
For this reason, many hand-made kitchen knives are deliberately in a mid-range geometry: slim enough for good cutting performance and durable edges,
without restricting the intended use too much. Added to this is that very thin, highly drawn-up grinds require more time and therefore increase
production costs.
In the custom sector, a wide range of steel types is used, from simple carbon steels to stainless steels and modern PM steels.
The categories “Japanese” and “European” used in this article can serve as an orientation for asking specifically about geometry, application and steel choice when buying hand-made knives.
