Both are all-purpose Japanese knives, and for most home cooks either will handle the bulk of daily prep. The choice comes down to length, blade shape, and how you like to cut.

A gyuto is the Japanese chef's knife - typically 210 to 240mm with a gently curved edge that lets you rock and slide through cuts as well as chop. The extra length and pointed tip give you reach and versatility, from proteins to large produce.

A santoku is shorter, usually 165 to 180mm, with a flatter profile and a rounded sheep's-foot tip. It rewards a straight up-and-down push cut, feels nimble in smaller hands or tight kitchens, and is the classic Japanese household knife.

Rule of thumb: choose a gyuto if you want one do-everything knife with more reach, or a santoku if you prefer a compact, easy-to-control blade. Plenty of our customers end up owning both.

A gyuto is the Japanese chef's knife — a double-bevel general-purpose kitchen knife. The name literally means "beef sword," and it's still a fair job description: you use it to slice meat, chop vegetables, dice aromatics, and break down fish. If you own one good knife, this is the shape it should be.

Versus a typical Western chef's knife, a gyuto is thinner behind the edge, sharpened to a keener angle (roughly 15–18° rather than 20–22°), and usually made from harder steel — often above 60 HRC. That's what makes it slice so cleanly: less crushing, less tearing. The trade-off is a more brittle edge, so it asks to be honed and sharpened more attentively than a soft Western blade.

Blades run from compact 150mm to long 240mm, but for a home kitchen I'd start at 210mm — my sizing FAQ explains why.

In a home kitchen I'd pick a 210mm gyuto. It's the sweet spot: long enough for a full slicing stroke, short enough to stay nimble on a normal cutting board and easy to control while you're still building your technique.

Step up to a 240mm only if you regularly break down large cuts — roasts, whole fish, big vegetable prep. The extra length means longer strokes and fewer passes, but it also means more weight and a bigger board; if the tip is hanging off your bench you're fighting the knife, not cooking with it. If you're mainly doing vegetables and portions, the 240 gives you nothing you'll use.

For a first gyuto, buy a well-made stainless one around 210mm in the low hundreds. Traditional carbon steels (white and blue paper steel) cut and sharpen beautifully, but they rust if you leave them wet — learn one variable at a time. Better steel is step two.

Get the 210mm. We only point people to a 240mm when they have about 45cm of usable board, cook in volume, and regularly break down big roasts or whole fish.

On the gyutos we've measured for our product pages, the extra length is real. The 210s have a median edge of 213mm from heel to tip and the 240s 240mm. The 240s are also heavier, 195g against 163g at the median, and a touch taller at the heel, 51mm against 48mm. End to end a 240 runs about 39cm and a 210 about 36cm.

That length buys you a longer stroke. A 240 goes through a big piece of meat in one or two pulls and moves a board of chopped vegetables with less shuffling. It costs you board space and control. On a small board the tip hangs off the edge, and fine work like herbs and shallots feels like more knife than the job needs.

If you want the sharpest possible edge and don't mind caring for a harder, more brittle blade, buy Japanese; if you want a tougher, more forgiving knife that can take abuse and be honed casually, buy German. Japanese knives, like the gyuto, are ground to a much sharper edge angle, typically 15 to 18 degrees compared to 20 to 22 degrees on a western chef's knife, and use harder steel that can exceed 60 HRC, which is why they cut with such precision but also chip more easily. German knives are softer and more ductile, so they resist chipping and bend rather than break, but they won't hold that razor-sharp edge as long.

A Japanese knife is not the right choice if you regularly cut through bones, frozen food, or hard squash, or if you're used to rocking the blade hard on a cutting board, that lateral stress and impact can chip the edge. German knives are the better everyday beater for heavy prep, but you'll trade away the effortless slicing and fine edge retention that make Japanese steel so satisfying.

The gyuto, literally "beef knife," is the Japanese take on a French chef's knife, with a flatter profile that suits push-cutting and slicing. That acute blade geometry is only possible because of the harder steel used, a typical western knife at 20 to 22 degrees would roll or dull quickly at 15 to 18 degrees, whereas the harder Japanese steel holds that finer edge. That's the core trade-off: hardness buys sharpness and edge retention, but it also makes the blade more brittle, so you need a gentler technique and a wooden or plastic board. For more on how these knives are built and what to look for, see the Knives and Stones Education Centre.

Yes - carbon steels such as Aogami (Blue) and Shirogami (White) react with food, moisture, and acids. Left wet they can spot or rust, and with normal use they develop a grey-blue patina. That patina is expected and is part of owning a carbon-steel knife; it is not damage.

Care is simple once it becomes habit: hand-wash in warm water, never leave the knife soaking or sitting in a wet sink, and dry it thoroughly the moment you finish. Avoid the dishwasher entirely, and wipe the blade between tasks when you are cutting acidic foods like citrus, tomato, or onion.

If the knife will sit unused for a while, wipe a very thin film of food-safe camellia oil (or a neutral mineral oil) onto the blade before storing it. A light surface rust spot lifts easily with a rust eraser or a little Bar Keepers Friend; sustained neglect is the only thing to really avoid.

Carbon steel rewards this small amount of attention with a keener edge and easier sharpening than most stainless. If you would rather not think about maintenance at all, ask us about stainless or stainless-clad options instead.

Aogami Blue steel, specifically Aogami Super (Blue Super), is a high-carbon Japanese knife steel made by Hitachi that chefs value for its ability to take an extremely sharp edge and hold it longer than most other carbon steels, thanks to a composition with 1.45% carbon, 2.25% tungsten, and added vanadium.

The "Blue" in Aogami refers to the color of the paper the steel is wrapped in at the mill, not the steel itself. Aogami Super is an upgraded version of Blue Steel No. 1, with higher carbon and tungsten content plus vanadium, which refines the grain structure. This lets the steel be hardened to HRC 62–65 without becoming overly brittle, giving you a blade that can be ground very thin for aggressive cutting performance while still resisting chipping in normal use. The trade-off is that, like all high-carbon steels, it is not stainless—it will rust if left wet or acidic, so you need to wipe it down and keep it dry.

Dry it as soon as you finish, keep it somewhere dry, and let a patina build. Do that and aogami (Blue) steel will hardly ever rust.

Aogami #1, #2 and Super all have less than half a percent of chromium, nowhere near what a stainless steel needs, so water left sitting on the blade will spot it.

The routine:

• Wipe the blade as you go, especially after onion, citrus or tomato.
• When you finish, wash it in warm water with a little soap and dry it straight away with a towel. Don't let it air dry or leave it in the sink or the dish rack, and never put it in the dishwasher.
• Store it dry: on a magnetic strip, in a saya or in a block in a dry spot. A damp drawer is the worst place for it.
• If it's going to sit unused for a while, wipe on a thin film of camellia or mineral oil.
• Let a patina form. The grey, blue and brown colours you get from cutting meat and vegetables are a stable oxide layer, and it slows rust down. Orange or red specks are rust.

If you do find rust, lift light orange spots with a rust eraser and a little water, then dry and oil the blade. We stock the CKK and Naniwa rust erasers. Rust on the edge itself comes off the next time you sharpen. Deep pitting is a job for us, so bring the knife in.

On a stainless-clad knife only the thin line of aogami along the edge can rust; the cladding stays clean. A carbon-clad or honyaki blade can rust over its whole face and needs the same care all over.