Seki Kanetsugu Nami: The Export Steak Knife Line

What "Nami" actually is

Start with the honest version, because it clears up most of the confusion around this line. "Nami" is not a formal series that Seki Kanetsugu markets in Japan the way it markets, say, its Saiun or Zuiun Damascus knives. It is a name that Western sellers and enthusiasts attach to Kanetsugu's steak knives. The word comes straight from the blade itself: the Japanese packaging on the core steak knife, the model ST-500, describes the edge as W波呾 (W-nami-ba), which translates literally as "double wave edge." 波 (nami) means "wave," and 呾 (ha, voiced to ba in compound) means "edge" or "blade." Somewhere along the line to the export market, that wave-edge marking became a product name.

So when you see a "Seki Kanetsugu Nami steak knife set" on an English-language store, you are looking at Kanetsugu steak cutlery whose defining feature is the micro-serrated, wave-ground edge. The name is descriptive marketing, not a Japanese brand line. This matters because a shopper who assumes "Nami" is a prestige series, the way "Miyabi" or "Shun" is a series, will be surprised: the flagship Nami knife in Japan is a utilitarian object that sells for roughly the price of a coffee.

There is a second, muddier layer. Separate from the everyday ST-500, at least one premium Damascus steak knife set has been sold to Western buyers under the same "Nami" wave branding, tied to Kanetsugu's centenary in 2018. That set uses forge-layered Damascus steel and laminated-wood handles and sits at a completely different price point. Both share the wave motif; they are otherwise unrelated products. We cover both below and flag clearly which is which, because conflating them is the single most common mistake made about this line.

This page is about the Nami name and its steak knives specifically. For the full story of the workshop, its swordsmithing lineage, its Damascus kitchen lines, and how to care for its blades, read our maker profile, Seki Kanetsugu: the century-old Kawamura workshop. The two pages are meant to be read together.

The maker behind Nami

The knives are made by Seki Kanetsugu Hamono Co., Ltd. (関兼次剛物), the Kawamura family workshop in Seki, Gifu Prefecture, the modern capital of Japanese cutlery. The company was formally founded in 1918 by Matsujiro Kawamura, and the family traces its "Kanetsugu" name to a swordsmith whose lineage they date back to 1345. Three generations of Kawamuras have carried the name from swords into modern kitchen and table cutlery, and today Kanetsugu is best known in the West for its VG-10 Damascus kitchen lines rather than its steak knives.

That lineage is the important context for the Nami steak knives. They come from a real, century-old Seki workshop with genuine forging heritage, but the steak knives themselves are the workshop's most utilitarian, mass-produced output, not its showcase craft. It is a bit like a respected winery that also bottles an honest everyday table wine: the pedigree is real, the specific product is humble.

We keep the company history brief here on purpose. The full account of the Kawamura family, the swordsmithing origins, the workshop's place in Seki, and its premium kitchen lines lives on the maker page: Seki Kanetsugu. For the city and its blade-making tradition, see our Seki city guide.

Positioning: an export label on an everyday knife

Every honest brand page has to answer the question "who is this for and where does it sit." For Nami, the answer is unusually clear once you separate the marketing from the metal.

In Japan, the ST-500 is a commodity table knife. It is the sort of serrated steak knife a household buys in a pack, throws in the dishwasher, and replaces without ceremony. Its virtues are exactly the virtues of a good commodity: it is made in Seki, it holds a usable edge for a long time thanks to its serrations, it resists rust, and it costs almost nothing. Nobody in Japan buys it as an heirloom.

In the export market, the story is dressed up. Grouped under the evocative name "Nami" and presented in curated four-piece sets, the same category of knife is sold to Western buyers who want "a Japanese steak knife" and are drawn to the wave motif and the Seki origin. There is nothing dishonest about that on the seller's part, the knives really are made in Seki, but a buyer should understand that the premium they may pay abroad is largely for presentation, set packaging, and import logistics, not for a different or higher grade of knife than the domestic ST-500.

Where Nami sits, then, is at the accessible, functional end of the Japanese steak knife world: honest, serrated, low-maintenance table cutlery from a heritage workshop, wearing an export-friendly name. It is not a rival to a forged, straight-edged, take-a-whetstone premium steak knife, and it does not pretend to be. If your goal is a plain-edge Damascus steak knife you resharpen and keep for decades, Nami's core ST-500 is not that knife, though, as we note below, the pricier centenary Damascus set sold under the same name is a different animal.

The models

Because "Nami" is a label rather than a strict catalog line, the range is best understood as the handful of Kanetsugu steak-table products it gets applied to. Specifications below are drawn from Kanetsugu and retailer product data; where a figure is a single-source claim we say so.

Steel and the wave edge

The Nami steak knives split cleanly into two material stories.

The everyday ST-500: 13-chrome stainless

The core ST-500 uses a 13-chrome stainless steel, a corrosion-resistant, easy-living alloy typical of dishwasher-safe table cutlery. It is not a high-carbon, high-hardness kitchen-knife steel, and it is not meant to be. The whole point of a serrated table knife is that the wave edge does the cutting work, so the steel prioritizes stain resistance and low maintenance over the extreme edge-taking of a chef's knife. You do not sharpen an ST-500 on a whetstone; you use it until it dulls and replace it. For the wider science of stainless kitchen alloys, see our VG-10 steel guide and the AUS-10 Damascus reference.

The wave edge (W波呾)

The defining feature is the W-nami-ba, or "double wave" edge. Rather than a single row of pointed serrations, the ST-500's edge is ground into a rolling, scalloped wave pattern (the "W" indicating the doubled, denser scallop). A wave edge grips and saws through fibrous or crusted foods, stringy steak, baguette crust, tomato skin, without the food slipping, and it stays functionally sharp far longer than a plain edge because the cutting happens on the protected inner curves of the scallops. The trade-off is the trade-off of all serrations: you cannot easily resharpen it at home, and it will not give the clean, polished push-cut of a straight edge. For the general topic, our article on serrated versus straight edges and the guide to sharpening a serrated knife both apply directly.

The centenary Damascus set: a different metal entirely

The premium commemorative set sold under the Nami name is the opposite proposition: a forge-layered Damascus blade around a hardened VG-grade stainless core, reported at roughly 60-62 HRC, with a plain 50/50 edge you can maintain on stones. If edge-taking Damascus is what you pictured when you heard "Japanese steak knife," that set, not the ST-500, is the product to look at, with the caveats about availability noted above.

Market presence and availability

Availability for the Nami steak knives depends heavily on which product and which country you mean.

In Japan, the ST-500 knife and fork are ordinary domestic goods, stocked through general retail and Japanese online marketplaces at commodity prices. They are easy to find and cheap. In the United States, Canada, the United Kingdom, continental Europe, and Australia, the knives reach buyers mainly through Japanese-knife specialty importers and cross-border online stores that ship from Japan, typically presented under the "Nami" name and often bundled into sets. Because these are low-value items, they are usually sold as part of a specialty retailer's broader Kanetsugu assortment rather than stocked widely in general kitchenware stores. Buy from authorized retailers and specialty kitchen shops that source directly from Japan to be sure you are getting genuine Seki-made product. The premium centenary Damascus set surfaces only intermittently, as befits a limited commemorative item.

Okami estimate: we assess the everyday ST-500 as widely and cheaply available inside Japan and reliably available to export buyers through specialty channels, while the premium "Nami" Damascus set is a scarce, intermittent item best treated as a limited release. Methodology note: this is an approximation built from public information, namely Kanetsugu and specialty-retailer product listings, Japanese and export marketplace availability, and the model's evident commodity positioning at home. It is not based on audited sales or distribution data, which Kanetsugu does not publish at the model level.

Sources: Seki Kanetsugu (Kawamura Hamono) product information; Japanese-market retail listings for the ST-500 and ST-500S including the W波呾 edge marking; Western specialty-importer product pages presenting Kanetsugu steak knives under the "Nami" name; and retailer documentation for the 2018 centenary Damascus steak set.

Nami vs the alternatives

Set expectations by category, because a serrated commodity table knife and a forged premium steak knife answer different needs. Below is the honest framing without naming specific competing brands.

The practical guidance: if you want a fuss-free, dishwasher-safe steak knife that stays sharp for years and is genuinely made in Japan, the ST-500 is a lot of honesty for the money. If you want a resharpenable, plain-edged Japanese steak knife you will keep and maintain, look either to the scarce Nami Damascus set or to a dedicated forged steak knife, and understand you are buying a different class of tool. What Nami is not is a premium enthusiast line hiding behind a cheap price; the core product is exactly what it appears to be, and that clarity is the point. For the broader landscape, see our guide to Japanese steak knives and the full directory of Japanese knife brands.

Nami FAQ

Is "Nami" an official Seki Kanetsugu product line?

Not really. "Nami" (波, "wave") is an export-market name that Western sellers apply to Kanetsugu's steak knives. It comes from the W波呾 ("double wave edge") marking on the core steak-knife model, the ST-500. In Japan the knife is sold as the ST-500, not under a "Nami" series name.

What steel is the Nami ST-500 steak knife?

The everyday ST-500 uses a 13-chrome stainless steel chosen for corrosion resistance and easy, dishwasher-safe living rather than extreme hardness. The separate, premium centenary "Nami" Damascus set uses a forge-layered Damascus blade around a harder VG-grade core, reported around 60-62 HRC.

Can you sharpen a Nami steak knife?

The serrated ST-500 is not designed to be resharpened at home; its wave edge stays functional for a very long time, and it is meant to be replaced when it finally dulls. The plain-edged centenary Damascus set can be sharpened on whetstones like any fine kitchen knife.

What does "Nami" mean?

Nami (波) is the Japanese word for "wave." It refers to the rolling, scalloped wave-ground serration on the steak knife's edge, marked W波呾 (W-nami-ba, "double wave edge") on the Japanese packaging.

Where are Nami knives made?

In Seki, Gifu Prefecture, Japan, by Seki Kanetsugu Hamono (the Kawamura family workshop), a company founded in 1918 with a swordsmithing lineage. The steak knives are their most utilitarian product, but they are genuinely Seki-made.

Is the Nami ST-500 a premium knife?

No, and it does not claim to be. It is an inexpensive, functional, dishwasher-safe serrated table knife that happens to come from a heritage workshop. The premium option under the wave name is the limited centenary Damascus set, which is a different and much pricier product.

Nami vs Kanetsugu's Saiun and Zuiun lines?

Those are different worlds. Saiun (彩雲, "iridescent cloud") is Kanetsugu's VG-10 33-layer Damascus kitchen line built for overseas buyers, and Zuiun (瑞雲, "auspicious cloud") is the higher centenary Damascus kitchen series. Both are proper forged kitchen knives you sharpen and keep. The Nami steak knives are table cutlery, not kitchen knives.

Should I buy the Nami steak knives?

If you want honest, low-maintenance, Japanese-made serrated steak knives at a friendly price, yes, the ST-500 delivers exactly that. If you want a resharpenable, plain-edged Japanese steak knife to keep for decades, look to the scarce Nami Damascus set or a dedicated forged steak knife instead.

Related reading

• Seki Kanetsugu: the maker profile, the Kawamura workshop and its full kitchen range
• Kanetsugu Saiun and Zuiun, the workshop's VG-10 Damascus kitchen lines
• Seki: the modern capital of Japanese kitchen knives
• VG-10 steel, the alloy behind Kanetsugu's premium blades
• Japanese knife brands and the makers behind them, the full directory

Further reading from our journal

• Japanese Steak Knives: elevate every meal at the table
• Best Knife for Cutting Bread: serrated vs straight edge
• How to Sharpen a Serrated Knife
• Japanese Knife Steel Types: the complete guide