Which Japanese knife should I buy first?

If you want a single do-everything knife, choose by how you cut. A 210mm gyuto suits cooks who rock the blade and cook varied food; a 165–180mm santoku suits choppers and smaller setups. The classic starter kit is one of those plus a 150mm petty for small work, which handles about 95% of home cooking and is what most people should begin with.

What's the difference between a santoku and a gyuto?

The gyuto is the Japanese take on a Western chef's knife: curved belly for rocking, a pointed tip, and length (around 210mm) for big jobs. The santoku is shorter (165–180mm), with a flatter edge and a rounded "sheep's foot" tip instead of a point, so it rewards an up-and-down chop or push cut rather than rocking. Choose the gyuto if you rock, the santoku if you chop.

What length gyuto is best for a home kitchen?

210mm is the sweet spot for most home kitchens. Step up to 240mm if you have the board space and cook a lot. Lengths run from 180mm past 270mm, but a 210mm gyuto balances capability and manageability for everyday cooking.

Do I really need a nakiri?

Only if you prep a lot of vegetables. The nakiri is a flat, rectangular double-bevel blade whose whole edge meets the board at once, making clean push-cuts and rhythmic vegetable chopping effortless. It's a brilliant second (or third) knife and a luxury rather than a necessity — but if you cut mountains of produce you'll feel the difference daily.

Should I buy a knife block set?

Skip it. Block sets bundle several knives you'll never use to justify the price. Buy fewer knives than you think you need in better steel than you think you need — a gyuto or santoku plus a petty covers most cooking. Also avoid a knife harder than you're willing to maintain, since an unsharpened thin Japanese edge becomes worse than a cheap stamped knife.

Santoku vs Gyuto vs Nakiri vs Petty: Which Japanese Knife to Actually Buy

Walk into a Japanese knife shop and the names run together — santoku, gyuto, nakiri, petty, bunka, sujihiki — each in three steels and six lengths. Ignore most of it. Four shapes cover the overwhelming majority of home cooking, and you almost certainly need only one or two of them. The trick is to read each blade as a shape built for a job, because with Japanese kitchen knives the geometry is the whole argument.

Gyuto: the all-rounder that thinks it's a chef's knife

The gyuto (牛刀, literally "cow sword") is the Japanese take on the Western chef's knife. It has a curved belly that lets you rock through herbs and garlic, a pointed tip for detail work, and enough length to break down a cabbage or carve a roast chicken. If you cook the way most Western recipes assume — a bit of rocking, a bit of slicing, a bit of everything — this is the one knife that does it all.

Lengths run from 180mm up past 270mm. For a home kitchen, 210mm is the sweet spot; 240mm if you have the board space and cook a lot. Compared to a German chef's knife, a gyuto is thinner behind the edge, harder, and lighter, so it parts food rather than wedging it apart. That thinness is the trade: it cuts beautifully and it does not enjoy being twisted through frozen meat or bone.

Buy a gyuto if you only want one knife and you cook varied food.

Santoku: shorter, flatter, friendlier

The santoku (三徳, "three virtues") is what most people picture as "the Japanese knife." It was designed in Japan in the 1940s to fold three single-purpose blades — the deba for fish, the gyuto for meat, the nakiri for vegetables — into one home-friendly knife, which is exactly what the name promises. It is shorter than a gyuto, usually 165–180mm, with a tall blade and a much flatter edge that ends in a rounded "sheep's foot" tip rather than a point. Because the profile is flat, it rewards a straight up-and-down chop or a push cut instead of rocking.

For smaller hands, smaller boards, and cooks who chop more than they rock, the santoku is genuinely more comfortable than a gyuto. The tall blade also makes it a natural scoop for moving piles of diced onion. What you give up is the pointed tip (less precise for coring or detail cuts) and the curved belly (less fluid for big piles of herbs).

Buy a santoku if you want one compact do-everything knife and you chop more than you rock.

Nakiri: the vegetable specialist

The nakiri (菜切り, "vegetable cutter") is a flat, rectangular, double-beveled blade — think tiny cleaver, though it is not built for bone. Its entire edge contacts the board at once, which makes clean push-cuts and the rhythmic chopping of vegetables effortless. Slice a daikon into paper-thin rounds, ribbon a head of cabbage, dice an onion without the back of the blade snagging — the nakiri does this better than anything else in a home kitchen.

Most are 165–180mm. Note the family resemblance to the usuba, the single-bevel professional vegetable knife used in Japanese restaurants; the nakiri is the double-bevel, ambidextrous, lower-maintenance cousin meant for everyday use.

Buy a nakiri if you cook a lot of plants and want the cleanest vegetable cuts you can get. It is a brilliant second knife.

Petty: the small one you reach for constantly

"Petty" comes from the French petit. It is a small utility knife, usually 120–150mm, that fills the gap between a paring knife and a full chef's knife. Peeling and segmenting fruit, trimming fat, mincing a shallot, slicing a sandwich, any job too fiddly for a 210mm blade — that is the petty's territory. It is also the knife you can use in your hand, away from the board.

A petty is rarely anyone's only knife, but it is the most-reached-for second knife in a huge number of kitchens.

So what should you actually buy?

One knife, period: a 210mm gyuto (rockers, varied cooks) or a 165–180mm santoku (choppers, smaller setups).
The classic two-knife kit: a gyuto or santoku for big work, plus a 150mm petty for small work. This handles 95% of home cooking and is what most people should start with.
The vegetable-heavy kitchen: add a nakiri as the third knife. It is a luxury, not a necessity, but if you prep mountains of produce you will feel the difference daily.

A few buying truths worth internalizing. Skip the block set — those bundle several knives you will never use to justify the price. Avoid a knife harder than your willingness to maintain it; a thin Japanese edge that is never sharpened or honed becomes worse than a cheap stamped knife. And whatever you choose, plan to learn to sharpen it (or pay someone who can), because the entire reason these knives feel so good is an edge geometry that only stays sharp if you keep it that way.

Buy fewer knives than you think you need, in better steel than you think you need, and learn to keep them sharp. That is the whole game.