What is identical across every Miyabi here
Read the four spec tables above in sequence and the pattern is obvious. The steel row says FC61 four times. The edge row says roughly 9.5 to 12 degrees per side. The construction row says ice-hardened. The origin is Seki, Japan, in all four cases. ZWILLING is not running a good-better-best ladder inside this range; it is selling one blade specification in several shapes and two finishes.
That is genuinely useful information for a buyer, because it means you cannot accidentally buy the compromised one, and it means the upgrade pressure inside the line is about appearance and handle shape rather than cutting. It also means the decision collapses into two questions, which is how this page is organized: which shape do you actually need, and do you want to pay for Damascus cladding.
Kaizen II or Koh: the only line decision that matters here
Kaizen II is the Damascus line. An FC61 core under 48 layers of stainless cladding, with a birch pakkawood D-shaped handle and a rounded bolster. ZWILLING describes the Kaizen II blade as FC61 with fine carbide distribution, double ice-hardened FRIODUR, hand-honed by the three-step Honbazuke method. It is the Miyabi that looks like the money.
Kohis the plain line. The same FC61 core, the same published 61 HRC, the same 9.5 to 12 degree Honbazuke edge, the same FRIODURx2 ice-hardening — with no cladding at all. A mirror-polished monosteel blade on an octagonal pakkawood handle over a concealed tang, which is the traditional Japanese handle format rather than the Western-facing D-shape.
Put plainly: the cutting is in the core, and both lines have the same core. Choose Kaizen II if you want the pattern and a fuller Western handle; choose Koh if you would rather spend the difference on a second knife. Our Damascus explainer covers what the layers do and do not do, and FC61 vs VG10 compares this core against the steel most of the Japanese knives on this site use.
What 9.5 to 12 degrees actually means for you
This is the number that makes a Miyabi feel different in the hand, and it is the number that should decide whether you buy one. A more acute edge has less steel supporting the apex, so it enters food with less force and separates a slice more cleanly — and it is correspondingly easier to damage. At roughly 10 degrees per side on a 61 HRC blade you have a knife that will glide through a tomato and chip if you twist it through a squash shell or lever against a bone.
Three practical consequences, none of them optional:
- No pull-through sharpener, ever. A fixed 20-degree carbide or electric slot does not maintain this geometry; it replaces it with a blunter one, and the first few cuts after that feel dramatically worse. Our Japanese-knife sharpener page covers what can actually hold a 12 degree edge.
- No ribbed steel rod.A 61 HRC edge does not bend back the way a 56 HRC German edge does — it micro-chips. A fine ceramic rod abrades very lightly instead, which is the right mechanism; see do Japanese knives need honing.
- A soft board, always. Wood or soft polyethylene. Glass, stone and ceramic destroy acute edges faster than any amount of cutting does, which is the first thing why knives get dull so fast covers.
If any of that sounds like more care than you want to give a knife, this is the wrong brand and we would rather tell you now. A forged German knife at a published 58 Rockwell is the forgiving alternative, and the Wüsthof page is where to read about it.
What Honbazuke is, in ZWILLING’s own words
Every Miyabi listing leans on the term, so it is worth knowing what is being claimed. ZWILLING translates Honbazuke as “true cutting edge” and describes three steps: the knife is “initially ground on a coarse vertical rotating sharpening stone,” then “finely honed on a horizontal rotating sharpening stone,” and finally “a vertical rotating leather stropping block is used to polish the grind/cutting edge.”
That is a real three-stage process ending in a strop, and it is the reason these knives arrive sharper than most. It is also worth noticing what the same page does notgive: no edge angle, no hardness figure and no guidance on honing rods appear in ZWILLING’s own account of the process — those figures come from the individual product pages. We cite them separately rather than blending them.
The three things ZWILLING does not publish
1. What FC61 actually is.ZWILLING names the steel only as “FC61 fine carbide stainless steel” and gives the hardness. It does not publish a composition or an industry designation anywhere we have found. The most-cited third-party account holds that “FC61 is Zwilling’s trade name for Sandvik 13C26, which is in turn essentially identical to Uddeholm AEB-L,” with a composition of 0.68% carbon and 13% chromium and a hardness target of 61. We report that as a third-party claim because that is what it is — ZWILLING has not confirmed it. If the equivalence holds, it is good news: AEB-L is a fine-grained steel known for taking a very keen edge, which is consistent with a 9.5 degree factory bevel.
2. Anything about thickness.Not the spine, not the blade height, not the cross-section behind the edge. On the Koh sujihiki, for example, ZWILLING’s dimension block gives “Length of product: 15.12 in,” “Width of product: 0.75 in” and “Height of product: 1.30 in” — figures that describe the packaged object rather than the blade. Thickness behind the edge is the property that decides whether food separates or splits, and it is unpublished here as it is almost everywhere; how thick should a chef’s knife be explains what to use as a proxy.
3. Weights you can compare.ZWILLING does publish per-model weights, and they do not reconcile across the two lines: the Koh 8-inch chef’s knife is listed at 0.62 lb against 0.44 lbs for the Kaizen II 8-inch, and the 9.5-inch Koh sujihiki at 0.35 lbs. A longer blade weighing little more than half of a shorter one is possible for a thin slicer, but a plain monosteel chef’s knife weighing substantially more than the clad Damascus version of the same length is hard to explain. We print the figures and decline to build an argument on them.
Where each one earns its place
- Kaizen II 8-inch chef’s knife — the one to buy first. 200 mm, FC61 at around 60 HRC, 48-layer Damascus, rounded bolster, birch pakkawood D-handle. It is a gyuto in all but name and it is the only knife here that can be your primary. The honest reservations: the D-handle is shaped for right hands, and it is priced with the Shun Classic rather than under it.
- Koh sujihiki 240 mm — the documented specialist.The only Miyabi in our registry with a hardness figure published for the exact model (61 HRC) alongside the edge angle, and the best-specified slicer on this site. 159 g of published weight on a 240 mm blade, octagonal handle, no cladding. It is a fourth or fifth knife — buy it if you carve roasts or slice fish, not as a general-purpose blade. Full detail in our Koh sujihiki review, and the field is in best sujihiki knives.
- Kaizen II nakiri — the vegetable knife with the fuller handle.165 mm, dead flat, tall enough to scoop. Its one advantage over the Shun Classic nakiri most people buy is the handle: the Miyabi D-shape is rounder in the palm, which suits larger hands. Its limitation is the shape, not the brand — no usable tip means it cannot replace a chef’s knife, and it is a push-cutting tool, which how to use a nakiri covers.
- Kaizen II bunka — the flat profile that keeps a point. 165 mm with a reverse-tanto k-tip: a nakiri’s board contact plus a point you can pierce and score with. The k-tip is the most chip-prone tip shape in a drawer, especially at this edge angle, and the knife overlaps a gyuto you may already own. Bunka vs santoku is the comparison to read before you commit to the shape.
What is not on this page, and why
Miyabi sells considerably more than four knives — Birchwood, Artisan, Mizu, Evolution, Hibana, 5000MCD and the SG2 lines among them. None of them appears here, for the same reason this site declines to rank Shun’s Premier and Kanso lines: we feature only products we can tie to a verified live listing and a published maker specification, with a price from our own daily check. A page that ranked the whole catalog from marketing copy would be a longer page and a worse one.
Two notes for anyone looking at those lines anyway. The powder-steel Miyabis (SG2 / 5000MCD) are a different proposition from FC61: harder, more wear-resistant, more expensive and more brittle, and the hardness chart sets out what that trade costs. And a Miyabi at a startling discount from an unfamiliar seller is a reason to slow down, not to hurry — where to buy Japanese knives covers the checks.
Warranty: read the authorized-seller clause before you buy
ZWILLING’s US warranty governs a Miyabi purchase, and its terms are specific. Products “will be free of defects in material and workmanship from the date of purchase for as long as said purchaser owns the product” — but it “does not cover defects resulting from normal wear and tear, misuse, abuse, alteration, negligence, or use of the product other than its intended purpose,” the original purchaser “must provide valid proof of purchase,” and it applies only to products “purchased in the United States from Zwilling or a Zwilling authorized seller located in the United States,” with ZWILLING reserving “the right to reject warranty claims for products purchased from unauthorized sellers.”
Two things follow. First, a chipped 10-degree edge is not a warranty matter in any reading of those terms — it is wear or misuse, so the care rules above are the actual protection. Second, if warranty cover matters to you, confirm the seller is authorized before you buy, and keep the receipt. We link to a marketplace because that is where the live price is; that does not make every seller on it an authorized one.
Care, in ZWILLING’s own words
The maker’s own instructions are stricter than most owners assume, and they are the right standard for a knife at this angle. Clean it “by hand using lukewarm water, mild dish soap and a non-scratch cloth or sponge” and dry it with “a plain dishtowel or microfiber cloth.” The dishwasher is ruled out for “aggressive chemical tablets,” “high temperatures” and “bumps and bangs with other objects.” Wooden handles are “not dishwasher-safe and should only be washed by hand,” with the wood benefiting from “regularly treating... with oil (e.g. linseed oil) or wax (e.g. beeswax).” And a knife needs “its very own space away from other objects, so not simply thrown in the cutlery drawer” — a block, drawer organizers or sleeves. The Koh sujihiki listing simply says “hand wash only.”
For sharpening, a 1000-grit stone sets the edge and a 3000 to 6000 finishes it; the technique is in how to sharpen a knife, and the honest answer to how often is in how often to sharpen a knife. Expect to maintain the factory angle rather than recreate it: nobody is reproducing a three-stage machine Honbazuke at home, and you do not need to.
How we ranked these
By shape and line utility, using ZWILLING’s own published figures for steel, hardness, edge angle, process, weight and origin, plus its published warranty and care terms — all cited below, with the one third-party claim about FC61’s composition labeled as third-party. We own none of these knives, we have run no cutting tests, and there is no score column on this page for exactly that reason. Prices come only from our live price layer and carry the date they were read.
