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Mazaki  |  SKU: MAZA_W2KU_GY21

Mazaki White 2 Kurouchi Gyuto 210mm

Regular price $379.95

IMPORTANT: Carbon steel knives can rust or patina quickly if not cared for properly. They require regular cleaning, drying, and oiling. If you are unfamiliar with carbon steel maintenance, we recommend choosing a stainless steel option instead.

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Availability

  • St Peters, NSW —
    2 Bishop St, Unit 2, St Peters NSW 2044
  • Crows Nest, NSW —
    107 West St, Shop 1, Crows Nest NSW 2065
    Pickup only
  • Prahran, VIC —
    180 Commercial Road, Shop 1, Prahran VIC 3181
    Pickup only
Detailed Specifications
Line Mazaki White 2 Kurouchi
Profile Gyuto / Chef's knife
Bevel Type Double Bevel
Weight 206 g | 7.3 oz
Edge Length 217 mm | 8 35/64″
Heel Height 51 mm | 2 1/64″
Width @ Heel 5.9 mm | 15/64″
Width @ Mid 2.1 mm | 5/64″
Width @ 1cm from Tip 0.9 mm | 1/32″
Steel White 2 / Shirogami #2 | Carbon
Blade Construction Sanmai - Soft Iron Clad
Hardness (HRC) 60 - 64
Surface Finish Kurouchi
Handle Octagonal Ebony Blonde Horn
Region Sanjo
Best for
  • Enthusiasts
  • Pro chefs
  • Free shipping for knives over AU$200 Australia wide.
  • World-wide shipping via DHL Express, 3 to 5 days.


Mazaki is one of those independent Sanjo makers who built a following fast, and the White 2 Kurouchi line shows exactly why. Where his Migaki line polishes everything away to a flowing brushed finish, the Kurouchi leaves the forging texture untouched outside of the bevel — the irregular surface, the organic forge marks, the visible record of how the blade was shaped all remain. It's a rawer, more characterful look, and for those who appreciate that kind of honesty in a knife, it's a compelling one.

The blade profile is broad with a generous heel height and a wide tip, making it particularly well suited to dicing and producing consistent thin slices in a committed push. What really defines the handling is the spine taper — Mazaki keeps the neck near the handle notably thick even by Sanjo standards, then tapers it aggressively down to around 2mm at the tip. This gives the knife an unusual combination of a stiff, confident spine near the handle and a featherlight, responsive tip. The forging quality behind this taper is worth noting: bringing the blade down to that kind of thinness at the tip without distorting the cladding line or introducing any warp in the blade is a genuinely skilful feat, and the Kurouchi finish makes this visible in a way a polished surface wouldn't.

The bevel is hand finished to a slightly convex shape with an organic Kasumi polish and low thickness behind the edge. The blade is forged thicker near the Shinogi line and combines this with a slightly concave Hira — creating a more pronounced change in angle at the Shinogi line that strengthens the food release effect as the slice reaches that transition. The result is a knife that cuts smoothly and releases cleanly without needing to be laser-thin to achieve it.

The core steel is White 2 (Shirogami #2), encased in soft iron cladding — which means the entire blade requires careful maintenance to prevent rust, and the steel will see more wear than Blue 2 under the same conditions. That said, White 2 rewards the effort with an edge that bites cleanly and sharpens back up with minimal fuss on a whetstone. For enthusiasts and professional chefs who are comfortable with that trade-off and prefer a knife that wears its craft openly, the Kurouchi is a very natural choice.

Pros Cons
  • Thin behind the edge
  • Great artistic
  • Exceptional profile
  • Prone to rust
Care Instruction
  1. Don't cut hard things! Japanese knives are brittle so bone hacking is a NO NO!
  2. Wash with neutral detergent after use, and wipe dry;
  3. Please don't wash knife with dishwasher, it will damage the wood handle;
  4. Be careful not to leave the knife close to a heat source for a long time;
  5. It is a lot more dangerous to cut with a blunt knife than a sharp knife!
  6. It is best to sharpen a Japanese knife regularly on a waterstone.
  7. Oil the (carbon) knife if storing for an extended period of time to prevent rust.

Mazaki

Mazaki: Naoki Mazaki's One-Man Forge in Sanjo

Mazaki is a one-man operation based in Sanjo, Niigata. His knife is artistically beautiful, and from the very beginning with very high level of Fit and Finish. I didn't look further into it as its cutting style was not my preference. 

A while ago I was able to sample his latest work and was thoroughly impressed by how much it has improved. His knife now cuts much better than his earlier ones. I am particularly impressed that Mazaki's knife is largely finished on a stone by hand, while it is a much more time consuming process, such process ensures the knife is straight and flat with minimal low spots. We are talking about a type of finishing that is very much like Shigefusa's final handle sharpening process (albeit not the same level of polishing), rather than a water grinder sharpening process, which creates unevenness and low spots along the blade road, and sometimes even worse: over-grind. Given the effort that Mazaki-san has put in, the production is understandably very limited, and given the low price, I am sure his work will be highly thought after very soon. 

“A one-man forge in Sanjo, Niigata. Naoki Mazaki trained under Kiyoshi Kato.”

Known for White 2 and Blue steel knives, largely finished on a stone by hand
Instagram @mazaki Read more about Mazaki

Mazaki · Sanjo

Knife details

Frequently asked questions

Gyuto or santoku: which should I choose?

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, with a gently curved edge that lets you rock and slide through cuts as well as chop. Tojiro's guide to Western knife shapes gives 150 to 210mm as the household size for a gyuto and up to 360mm for professional use. The extra length and pointed tip give you reach and versatility, from proteins to large produce.

Tojiro's guide to Japanese knife shapes gives 165 to 170mm as the household size for a santoku, which has 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.

What is a gyuto knife used for?

The gyuto (牛刀) is a chef's knife for all kinds of cooking, and it is basically double-bevel. A knife maker's guide says it came to Japan in the Meiji era with the culture of eating beef, which gave it its name, but it does not cut only meat.

A Japanese dictionary describes the gyuto as slimmer than a santoku, with a pointed tip, used widely for meat, fish and vegetables.

What gyuto length should I choose?

A knife maker's guide lists 150 to 210 mm, double-bevel, for home use, and 180 to 360 mm, single- or double-bevel, for professional kitchens.

We suggest starting with a 210 mm gyuto for a home kitchen, and stepping up to 240 mm if you regularly cut large pieces and have the board for it.

240mm vs 210mm gyuto: which size should I choose?

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. As of October 2026, the 210mm gyutos we list have a median edge of 213mm from heel to tip, across the 111 we have measured; the 240mm ones have a median of 240mm, across 100. The 240s are also heavier, 212g against 175g at the median, and a touch taller at the heel, 50mm against 48mm.

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.

Japanese or German kitchen knives: which should I buy?

Our advice: choose a Japanese knife if you want the keenest edge and do not mind caring for a harder blade, and a German knife if you want a tougher, more forgiving knife you can hone casually and use for heavy prep. On two Japanese knife steels, the steel makers' own figures start at 60 HRC: Takefu Special Steel rates VG10 at 60 HRC or more, and Proterial lists the hardening hardness of Aogami 2 (Blue 2) as over 60 HRC.

Our care advice for a Japanese knife: keep it off bone, frozen food and very hard squash, and use a wooden or plastic board.

What is the flat spot on a knife, and is it the same as the "sweet spot"?

The flat spot is the straight run of edge from the heel towards the middle, the part that meets the board along its length. At our counter we call it the sweet spot; elsewhere "sweet spot" often means the balance point, so ask which one someone means.

Past the flat, the edge curves up towards the tip (the belly), which suits a swinging or pulling stroke. Sharpeners also say "flat spot" for a worn patch of edge, so when you mean the shape, "the flat part of the edge" is clearer.

Shirogami 1 vs shirogami 2 — what is the difference?

Shirogami 1 (White 1) has a higher carbon content than Shirogami 2 (White 2), roughly 1.3% vs 1.1%.

White 2 (Shirogami #2) has about 1.1% carbon and, per Proterial, a hardening hardness of over 60 HRC; White 1 sits around 1.3% carbon. That 0.2% difference is the core spec gap. More carbon generally means you can push hardness higher and hold a keener edge, but it also makes the steel more brittle and less forgiving. White 2 trades a bit of that potential peak sharpness for slightly better toughness and ease of sharpening.

Shirogami 1 carries a certain prestige. Sukenari's Nobuo Hanaki once told me directly that they only use White 1 for their mizu-honyaki because it is the pure form of carbon steel, it carries that halo. Among traditional smiths, White 1 is still spoken of as the benchmark.

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