Santoku Knife Guide: What It Is, How to Choose One and How to Use It
A santoku is a compact, Japanese-style, all-purpose kitchen knife with a flat edge and a rounded tip. This guide explains what defines one, which specifications are worth comparing, and how to use and look after it.
Short answer
- A santoku is a general-purpose kitchen knife, usually about 15 to 18 cm (6 to 7 inches) long, with a mostly flat edge and a tip that curves down to a rounded point.
- It is at its best with push cuts and slicing: vegetables, herbs, boneless meat and fish.
- Choose one if you prefer a lighter knife and a straight, up-and-down cutting motion. A chef’s knife suits cooks who rock the blade or cut large roasts.
- When comparing models, look at steel, hardness, length, handle and balance, in that order.
What is a santoku knife?
“Santoku” is usually translated as “three virtues” or “three uses”. Sources disagree about what the three are: some read it as the three kinds of food the knife handles (meat, fish and vegetables), others as the three jobs it does well (chopping, dicing and slicing). Both readings point to the same idea, one knife for most everyday prep.
It is a relatively modern design. Wikipedia dates the santoku to the 1940s, when it was created to combine the strengths of several traditional Japanese knives, and its article on Japanese kitchen knives calls it the most popular knife in most Japanese homes. Santoku-style knives are now made far beyond Japan, so the word describes a shape rather than a country of origin.
How a santoku is shaped
- Length. Most blades are about 15 to 18 cm (6 to 7 inches), and some run to 20 cm. The typical European chef’s knife is around 20 cm (8 inches), so a santoku is the same size or shorter.
- Edge. The cutting edge is flat or nearly flat for most of its length. The whole edge meets the board at once when you push down, which suits clean slicing but leaves little room for rocking.
- Tip and spine. The spine curves down toward the edge and ends in a rounded “sheep’s foot” tip. You get less of a point than on a chef’s knife, which makes the tip sturdier and less suited to piercing.
- Thickness and weight. Santoku are generally shorter, thinner and lighter than European chef’s knives. Thin blades are often paired with harder steel so the edge stays sharp.
- Optional hollows. Some models have shallow scallops, called a Granton edge, along the blade to reduce friction and help slices fall away.
What a santoku does well
- Vegetables. The flat edge and thin blade cut through produce in a single push, from cucumbers and peppers to onions.
- Herbs, garlic and shallots. Short, controlled chops are easy on a flat edge, and a 7-inch blade leaves little overhang on a small board.
- Boneless meat and fish. Long, even slices come from a thin blade and a straight pull or push.
- Everyday volume. It is light enough to use for a full prep session without tiring the wrist.
Where a santoku falls short
- Rocking cuts. A flatter edge supports less rocking than a curved chef’s knife, which some cooks rely on for fast mincing.
- Large cuts. A longer blade gives more reach through a big roast or a large squash. European chef’s knives range from 15 to 36 cm.
- Bones and frozen food. A thin, acute edge chips more easily on hard material. Use a cleaver or boning knife for bones, and let frozen food thaw first.
How to choose a santoku
These are the specifications worth comparing, roughly in order of importance.
- Steel. Carbon steel corrodes more easily and needs drying after use; stainless steel resists corrosion because of its chromium content. Most kitchen santoku today are stainless. See AUS-10 steel explained for one example.
- Hardness. Hardness is quoted on the Rockwell C scale (HRC). AUS-10 knives, for example, are typically quoted at 58 to 60 HRC. A higher number usually means a longer-lasting edge and less tolerance for twisting or hard foods.
- Length. Seven inches (about 18 cm) is a common middle choice that fits most cutting boards and hands. Go shorter for small boards or small hands, longer if you like extra reach.
- Bevel. A santoku is normally double-bevel, meaning both sides of the edge are ground. Traditional single-bevel Japanese knives can require more care and expertise to use and sharpen, according to Wikipedia.
- Handle and balance. Hold the knife in a pinch grip, thumb and forefinger on either side of the blade just ahead of the handle. It should sit level rather than tip toward the handle or the blade. Material matters less than how secure it feels wet.
- Support. Check the warranty, the return window and who pays for return shipping before you buy.
Specifications such as steel type and hardness come from the maker. If two listings quote very different numbers for the same steel, ask the seller where the figures come from.
How to use a santoku
- Set up a stable wood or soft plastic board. A damp towel under the board stops it sliding.
- Use a pinch grip on the blade and curl the fingertips of your other hand under, like a claw, so the knuckles guide the blade.
- Push the knife forward and down through the food in one smooth stroke. Let the edge do the work rather than forcing it.
- For mincing, keep the tip near the board and make short, controlled chops.
- Do not twist the blade inside hard foods, and use the spine, not the edge, to scrape food off the board.
Care in brief
Wash by hand with warm soapy water and dry the blade straight away; do not put it in the dishwasher or leave it soaking. Store it in a block, on a magnetic strip or in a sheath instead of loose in a drawer. Keep the edge true with regular honing and sharpen on a whetstone when honing no longer brings the edge back; the sharpening guide walks through the steps. If your blade has a layered pattern, the Damascus care guide covers cleaning and rust.
Frequently asked questions
Is a santoku good for meat?
Yes for boneless meat and fish, where the thin blade gives clean slices. For bones or heavy joints, use a cleaver or a boning knife.
Can I use a santoku on frozen food?
It is best not to. A thin, hard edge can chip when it hits frozen food, so let items thaw before cutting.
What size santoku should I buy?
Seven inches (about 18 cm) suits most home kitchens. Choose a shorter blade for small boards or hands, or a longer one if you want more reach.
Is a santoku the same as a chef’s knife?
No. Both are all-purpose knives, but a santoku is usually shorter and thinner with a flatter edge and a rounded tip, while a chef’s knife is longer with a curved edge and a pointed tip.
Sources
Key facts come from these pages. Practical advice and worked examples in the text go beyond them and are not quotations from them. Specifications for any one knife are the manufacturer’s to confirm.
- Santoku, Wikipedia
- Japanese kitchen knife, Wikipedia
- Chef’s knife, Wikipedia
Related guides
- Santoku vs chef’s knife
- Santoku vs bunka
- How to sharpen a santoku
- Damascus steel care
- AUS-10 steel explained
TUO Kitchen Pro 7-inch Santoku
AUS-10 Damascus, 60 HRC. Free US shipping. 30-day returns, return shipping paid by the customer.