Explainer
What Is a Santoku Knife Used For?
A santoku knife handles vegetables, boneless meat and filleted fish with a flat, thin blade. See what it cuts, how to use it and what to avoid.
The name santoku is usually translated as three virtues, and the knife earns it by covering vegetables, boneless meat and fish with a single blade. What it does not cover matters just as much: one slip into a bone or a frozen block can chip the edge. Knowing where the line sits is what makes a santoku worth reaching for every day.
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Why a santoku is called a three-virtue knife
The santoku is a Japanese all-purpose knife that took shape in home kitchens after the war, sitting between the traditional vegetable-focused nakiri and the Western chef knife. The three virtues are vegetables, meat and fish, which is also a fair summary of its job: slicing, dicing and chopping.
Its design explains the range. The blade is short, thin and mostly flat, with a gently curved tip, so the whole edge meets the board in one motion. That suits clean, even cuts far better than heavy chopping.
What a santoku cuts best
A thin, flat blade cuts through plant cells rather than crushing them, so vegetables are where the knife is strongest. Boneless proteins and fish that has already been filleted follow close behind.
- Vegetables: julienne cabbage, dice onions, slice cucumber and carrot into even rounds.
- Fruit: tomatoes and citrus, where a sharp edge parts the skin without squashing the flesh.
- Herbs and aromatics: scallions, parsley, garlic and ginger.
- Boneless meat: poultry breast, pork loin cuts, thin beef slices and cured pork.
- Fish after filleting: portioning salmon or cubing fish for poke.
Five steps to a clean push-cut
The santoku rewards a different habit from a Western chef knife. Instead of pivoting on the tip, each cut is a single forward-and-down stroke, and cooks used to rocking often need a couple of weeks to retrain the motion.
- Pinch the blade at the bolster between thumb and forefinger, and wrap the other three fingers around the handle.
- Set the edge flat above the food.
- Push the knife forward and down on a diagonal, not straight down.
- Let the blade travel from its heel to its tip as one stroke.
- Lift the blade clear once the edge reaches the board, then reset for the next slice.
What a santoku should not cut
Hard steel holds an edge well but forgives little lateral force or impact. These jobs belong to other knives, and handing them to a santoku is the quickest way to chip it.
| Task | Why it fails | Better tool |
|---|
| Bone-in chicken breakdown | Hard edge chips on bone | Honesuki or boning knife |
| Frozen food | Cold steel turns brittle | Defrost first |
| Crusty bread | Crust chips the edge | Serrated bread knife |
| Whole-fish breakdown | Blade too rigid for the spine | Deba |
| Hard squash skin | Sideways force chips the edge | Heavy chef knife or cleaver |
Santoku or chef knife: which fits your cooking
Both are everyday all-rounders, but they are built around opposite motions. Cooks who prep a lot of vegetables with straight push-cuts will find the santoku more comfortable; cooks who work through large cuts of meat and like to rock the blade are better served by a chef knife.
Buyers who want both in one purchase can check the knife set cyber monday comparison, which covers which block sets include a santoku next to a chef knife and a paring knife.
| Attribute | Santoku | Chef knife |
|---|
| Blade length | 165-180mm | 200-250mm |
| Edge profile | Mostly flat | Curved belly |
| Cutting motion | Push-cut | Rock-cut |
| Strongest at | Vegetables and slicing | Large proteins and rocking mince |
Frequently asked
What size santoku should I buy?
170mm is the usual home choice. Smaller hands or a compact board suit the 165mm end, and larger hands suit 180mm. Shorter than about 150mm starts to behave like a petty knife, and past 190mm the blade is in gyuto territory.
Santoku or gyuto for a home cook?
It depends on how you cook. A santoku suits vegetable-forward push-cutting and fits a small board, while a gyuto at 210-240mm has a longer curved tip that is better for slicing large cuts of meat and rocking through herbs.