What is a Sashimi Knife? The Difference Between a Yanagiba Knife and a Sashimi Knife and How to Choose One
A sashimi knife can enrich your dining table with just one item.
The biggest difference between this knife and the all-purpose Santoku knife is that it is specialized in "sealing in the flavor" without destroying the fish cells .
In this article, we will clearly explain everything from the basics of sashimi knives to tips on how to choose one that even beginners can use without making a mistake, and recommended materials.
What is a sashimi knife?
A sashimi knife is the ultimate knife born from Japanese food culture, designed to allow you to enjoy the delicious taste of fish .
Its unique shape and structure have all evolved in pursuit of one thing: "bringing out the maximum flavor of the ingredients." Here we will explain the basic definition of a sashimi knife and its specialized uses.
Definition of a Sashimi Knife
A sashimi knife is a traditional Japanese knife that is primarily used to cut raw seafood into thin or uniform slices called "sashimi." Its defining characteristics are that it is long, thin, and single-edged .
The long blade length allows for a "pull cut" using the entire blade from base to tip in one go, and the thin blade minimizes resistance to food .
The single-edged design, with a blade on only one side, cuts sharply into food, creating a glossy, sharp cross-section without damaging the cells.
Furthermore, the back side (the side that comes into contact with the food) without the blade has a slightly concave structure called "urasuki" or "uraoshi."
This indentation prevents the cut meat from sticking to the knife, making it much easier to "cut away." This is also an important device for preserving freshness without rubbing the ingredients.
A cutting method that is best used with a sashimi knife
A sashimi knife is a specialized knife used to cut saku (blocks) of fish to be eaten as sashimi, such as tuna or flounder .
Its long blade makes it possible to "pull cut" and is particularly effective in the following cutting methods.
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Hirazukuri (sliced flatfish)
・The most basic way to cut sashimi: hold the knife vertically and pull to create thick slices.
- Even with soft red fish, the cells are not crushed, leaving a chewy texture.
[Best fish] Tuna, yellowtail, salmon, etc.
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Thinly sliced fish
-This is a technique where you lay the knife flat and cut so thinly that you can see through to the other side.
- Even firm white fish can be enjoyed with just the right amount of texture by slicing it thinly.
-This is a cutting method unique to sashimi knives, as the blade is thin and the meat does not stick to the fish.
[Best fish] Flounder, red sea bream, pufferfish, etc.
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Skinning
-The process involves peeling off only the skin while preserving the flavor between the skin and the flesh.
- By taking advantage of the long blade length and drawing it in one stroke, you can achieve a neat finish without stopping midway.
[Best fish] Sea bream, horse mackerel (sliced with skin), etc.
*Caution* The blade is thin and delicate, so cutting hard objects such as bones or frozen foods may cause the blade to chip.
Why does a sashimi knife make fish taste better?
Why does a sashimi knife make fish taste so delicious? The secret lies in the science behind the "cutting method" which is completely different from that of a regular Santoku knife.
There are three main reasons for this:
- Prevents loss of umami flavor : The fish cells are not crushed, and the umami components (drip) are completely trapped within the flesh.
- Improved texture and appearance : The cross section is smoother, creating a texture that clings to the tongue and a glossy, "edgy" appearance.
- Maintaining freshness : Minimizing the surface area exposed to air prevents oxidation, which causes deterioration of flavor.
While a typical Santoku knife cuts by "crushing" the flesh, a sashimi knife makes use of its thin single-edged blade to smoothly "pull" the cut .
The knife is drawn in one stroke, using the entire length of the blade from the base (shank) to the tip (edge). This series of movements is the key to achieving the three benefits mentioned above.
Only with a sashimi knife can you experience the thrill of transforming your ordinary sashimi into a dish that looks just like it's served at a restaurant counter. If you're looking for the ultimate taste at home, this is the knife you'll want to own.
The difference between sashimi knives and other knives
To understand the uniqueness of sashimi knives, let's compare them to other knives commonly used at home. By understanding the differences between sashimi knives and yanagiba knives and santoku knives in particular, it will become clear why a sashimi knife is necessary.
Differences from Yanagiba knives
In conclusion, you can think of them as almost the same thing.
Sashimi knives and yanagiba knives are the names of a category and a representative type within that category , and are generally used as terms that refer to almost the same thing.
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Sashimi knife: A general term for a knife used to cut fish fillets.
- Yanagiba knife: The most standard of sashimi knives, this knife has a pointed tip.
The large group of "sashimi knives" includes the most representative type, the "yanagiba knife."
It's the same relationship as having "apples" in the group "fruits."
So, when you look for a "sashimi knife" in a store, you can't go wrong if you remember that in most cases it means a "yanagiba knife."
*Compared to the yanagiba knife is the Kanto-style takohiki knife, which has a square tip.
Difference from a Santoku knife
Santoku knives and sashimi knives, the two most commonly used knives in homes, are originally designed for different purposes. The differences can be summarized as follows:
| Comparison items | Sashimi knife (yanagiba, etc.) | Santoku knife (all-purpose knife) |
| Blade structure |
Single-edged |
Double-edged |
| How to cut |
Pull-off |
Push through |
| Main uses |
Dedicated to slicing sashimi |
All-purpose (meat, fish, vegetables) |
This difference in structure and cutting method directly affects the final "taste."
When using a Santoku knife to "push cut," the force of pressing down on the ingredients is applied from above, which inevitably breaks the cells in soft fish flesh, causing the umami components (drip) to escape .
In contrast, a sashimi knife has a sharp single blade that cuts smoothly without damaging the cells, resulting in beautiful sashimi with a smooth, crisp texture that locks in the fish's natural flavor .
Do you really need a sashimi knife? You can also choose not to.
When you hear the term "special knife," many people wonder if they really need one. The bottom line is that not everyone needs a sashimi knife. A regular Santoku knife or Gyuto knife can serve as a substitute to some extent.
However, if you have even the slightest desire to make your usual sashimi even more delicious, a sashimi knife will meet your expectations.
Use the checklist below to help you decide whether or not you really need it.
If any of these apply to you, we highly recommend purchasing this product.
☐ I often buy sashimi (sashimi) at the supermarket.
☐ My hobby is fishing, and I sometimes prepare the fish I catch myself.
☐ I want to serve delicious fish dishes in style at home parties, etc.
☐ I want to take my cooking to the next level by using the right tools
☐ I honestly think that the beautiful cross-section of the sashimi looks delicious.
[On the other hand, cases where it is considered "not necessary yet"]
What you basically eat is "sashimi (fillets)." If you mainly eat already sliced sashimi, there is little need for it.
I want to minimize the number of knives I own. Even if you have a minimalist mindset and want to avoid increasing the number of kitchen tools you own, there's no need to go out of your way to buy more.
How to Choose a Sashimi Knife
We will explain the selection criteria for sashimi knives in order of priority. These four steps will help you find the perfect knife for you.
Step 1: [Most Important] Choose the Shape of the Knife
There are several types of sashimi knives, but there is a specific shape that you should choose as your first knife for your home.
- Yanagiba knife : Characterized by a sharp tip and a willow leaf shape, this is the most standard sashimi knife in Japan, and is the perfect first knife for both home and professional use.
- Takohiki knife : A sashimi knife with a square tip. This is a Kanto-style knife made primarily to make it easier to cut octopus.
- Fuguhiki knife : A knife made specifically for cutting pufferfish, thinner and finer than a yanagiba knife. It requires extremely delicate handling.
Step 2: Choose the "material" that determines sharpness and maintenance
Hagane: For discerning customers who pursue the ultimate taste
- Its appeal lies in its superior sharpness, which does not damage the food's cells and sticks to them.
- Depending on the steel, they are easy to resharpen, making them a favorite among professional chefs.
- However, because it rusts easily, thorough care is required, such as immediately washing and wiping off any moisture after use. (Representatives: White Steel, Blue Steel)
Stainless steel: [For home dwellers who want both convenience and performance]
- Its greatest advantage is that it is extremely rust-resistant and easy to maintain.
- The idea that "stainless steel cannot be cut" is a thing of the past. Nowadays, with technological advances, most knives have a sharpness approaching that of steel.
- In particular, high-performance stainless steel such as "Ginsan" has a sharpness that even professionals will be satisfied with, making it ideal for the first knife for home use.
If you are willing to put in the effort to maintain your knife and pursue the ultimate in flavor and sharpness, choose a steel knife. If you want to enjoy delicious sashimi without worrying about rust, choose a stainless steel knife.
Step 3: Choose the blade length, which determines ease of use
In order to perform the "hiki-kiri" (cutting with one stroke), which is the true essence of a sashimi knife, it is essential that the blade is long enough for the size of the sashimi.
For home use, the golden size is "210mm to 240mm." This size is best for use in a typical home kitchen. If you're unsure, we highly recommend "240mm (8 sun)."
Why is 240mm the best size?
- Cutting the sashimi in one go : If the width of a typical sashimi block sold at supermarkets is 240mm, you can easily cut it in one go using the tip of the blade from the base.
- Easy to handle : It is easy to handle even though it is the same size as a regular household cutting board, and is just long enough to avoid hitting it against the sink or wall.
*If you have small hands or a compact kitchen, the 210mm knife may be fine, but it may not be long enough when cutting large pieces of tuna, so the more versatile 240mm knife is the first choice.
Step 4: [Don't forget] Choose your dominant hand
Unlike regular knives, sashimi knives have a single-edged blade, meaning the blade is only on one side. Therefore, you need to make sure you choose one that suits your dominant hand.
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Right-handed / Left-handed
Most commercially available products are for right-handed people. If you are left-handed, be sure to choose one that is clearly labeled "left-handed." It may be a little more expensive or may have to be made to order.
How to maintain the sharpness of your sashimi knife
Maintaining the sharpness of a delicate sashimi knife requires a little knowledge.
The basic rule: wash immediately and wipe immediately
Steel knives in particular will begin to rust even if they are left wet for just a few minutes. After use, wash them immediately with a soft sponge and then wipe them completely dry with a dry cloth.
How to sharpen: Don't use a sharpener, use a whetstone
Sashimi knives are single-edged, so you should never use a simple sharpener for double-edged knives. The blade will lose its shape and become dull. Maintenance should basically be done with a whetstone. If you absolutely must use a simple sharpener, be sure to choose one that is clearly marked as "for single-edged knives."
Frequently Asked Questions (FAQ)
Q. Can I cut meat and vegetables with a sashimi knife?
A. You can cut it, but we don't recommend it.
Because the blade is very thin, cutting hard objects can cause chipping. Also, if fat from meat gets on the blade, the smell can transfer when cutting fish.
Q. I am right-handed, but can I use a left-handed sashimi knife?
A. It cannot be used.
Single-edged knives are designed so that food flows toward the blade side, making it very difficult to cut straight when using a knife with your non-dominant hand.
Q. How do you distinguish between "yanagiba" and "takohiki"?
A. The sharp tip of the yanagiba knife makes it a versatile knife that can easily cut into ingredients.
The blade of the takohiki knife is parallel and heavy, making it suitable for cutting hard and slippery ingredients like octopus by pressing down on them from above.
Q. What is the difference between a deba knife and a sashimi knife?
A. The objects being cut are completely different.
A "deba knife" is a thick, sturdy knife for cutting fish, including heads and bones. In contrast, a "sashimi knife" is a knife for cutting fish, for thinly slicing the boneless flesh after cutting. Because the blade of a sashimi knife is thin, trying to cut through bones like with a deba knife will chip the blade, so you should absolutely avoid doing so.
Q. What should I do if my steel sashimi knife becomes rusty?
A. If the rust is light and superficial, it may be possible to remove it by rubbing it with a commercially available cleanser (abrasive) and the hard side of a sponge or a cork.
However, if the rust is deep, you may need to use a special rust removal stone or repair. The basic rule for preventing rust is to wash and wipe the item immediately after use.
Q. I understand that it should be sharpened with a whetstone, but how often should I sharpen it?
A. Ideally, you should clean your knife after every use, like a professional chef would, but if you're using it at home, it's fine to clean it whenever you feel like it's losing its sharpness, or once every few times.
If the knife loses its sharpness, excess force will be applied when cutting, crushing the cells and ruining the flavor of the sashimi. Maintaining a good sharpness is the shortcut to delicious sashimi.
summary
A sashimi knife is not just a cutting tool, but a specialized tool for bringing out the maximum flavor of fish.
- The long blade is used in a "pull-cut" technique to lock in the flavor without destroying the fish's cells.
- The four steps to choosing are: shape (yanagiba) → material → length (240mm) → dominant hand.
- The golden rule for maintenance is to wipe it immediately. Sharpening is done with a whetstone.
Why not get your favorite one and enrich your family dinner table? Enjoy beautiful, sharply cut sashimi at home.