Shizu Hamono Gen: The VG-10 Line
A VG-10 core wrapped in 33 layers of Damascus, then given a genuine black kurouchi finish that took the maker years of development to pull off on stainless. Gen is Shizu Hamono's most distinctive line: dark, layered, and built around one of the best-understood premium steels in Japanese cutlery. Here is what it is, line and steel.
Shizu Hamono Gen in one paragraph
Gen (玄) is a premium VG-10 line from Shizu Hamono, a Seki cutlery maker whose factory discipline is the reason it fills so many kitchens without a loud brand. Every Gen blade pairs a VG-10 core with 33-layer Damascus cladding and a real kuro-uchi black forged finish, an unusual combination that the maker reportedly spent well over two years developing for a stainless blade. The result is a dark, distinctive, high-performance knife with a Japanese wa-handle in laminated wood, offered across the full range of shapes from petty to gyuto, santoku, nakiri, and bunka. The core steel is VG-10, the cobalt-alloyed Takefu stainless that defined the first wave of premium Japanese knives in the West, so edge performance is well up in the premium tier; the maker does not publish a hardness figure, though retailers commonly cite around 60 HRC. Unlike its stablemates, Gen is the VG-10 line: it sits above Shizu's AUS-8 Damascus line and its simpler mono-steel everyday line in both steel and price.
What Gen is
Gen is a premium line from Shizu Hamono built around a single, well-defined recipe: a VG-10 core, 33-layer Damascus cladding, and a black kuro-uchi forged finish, fitted with a Japanese-style wa-handle in laminated wood. It is the most visually distinctive knife the maker offers, and one of the more unusual constructions in the Seki catalog, because a genuine kuro-uchi finish on a stainless Damascus blade is technically difficult and rarely attempted.
The line is a real, cataloged Shizu Hamono product, documented on the maker's own Japanese and English materials, not a retailer relabeling. Its identity is clear and consistent: wherever you find it, Gen means VG-10 at the core, 33 Damascus layers around it, and a dark forged face. That coherence is part of what makes it easy to recommend to a buyer who wants one premium do-everything knife with a strong visual character.
This page covers the Gen line specifically, its steel, construction, and models. The company itself, its history, its factory, and the rest of its range are covered on our maker profile, Shizu Hamono: Trusted Seki Manufacturer, which includes our own account of visiting the factory floor. We keep the company story brief here and point you there for the full picture.
The name and the kanji
Unlike some line names we treat cautiously, this one is confirmed. Shizu Hamono writes the line with the kanji 玄, and on its own English materials the maker glosses it directly: Gen (玄) is described as meaning "black" and "expert." Both senses fit. The black meaning speaks to the kuro-uchi forged finish that defines the blade's appearance, and the expert meaning speaks to the line's positioning as the maker's serious VG-10 offering. Because the maker itself uses and explains the character, we are comfortable presenting it here rather than restricting ourselves to romaji.
A small practical note: individual blades are often marked "GEN" in Latin letters alongside the maker's mark, with the kanji 玄 documented in the maker's catalog and web branding. So whether you see the romaji or the character, you are looking at the same line.
The maker behind Gen
Gen is made by Shizu Hamono (志津刃物製作所), a cutlery maker in Seki, Gifu Prefecture, whose modern company was incorporated in 1980 with craft roots going back to a Seki knife maker who began producing export blades in the late 1950s. The name honors Saburo Shizu, an old Seki master swordsmith, tying the company to the city's deep blade-making lineage. The maker also uses the brand mark Shizu-takumi (志津匠) on some of its materials.
What defines Shizu Hamono is production discipline rather than marketing. It is a serious working factory that runs the whole process from steel selection through final edge inspection under its own roof, which is why its knives are consistent in geometry and finish. We keep the company account short here because it lives in full, including our own factory visit, on the Shizu Hamono maker profile.
Where Gen sits
Gen is the premium line in Shizu Hamono's range: the VG-10 tier, above the maker's AUS-8 Damascus line and its simpler everyday mono-steel line in both steel and price. It is aimed at a buyer who wants genuine premium-tier edge performance and a knife with strong visual identity, but who is buying a working tool rather than a collector's piece.
The positioning rests on three things. First, the steel: VG-10 is a proven premium stainless with excellent edge-taking and edge-holding for its class, so Gen competes on performance, not just looks. Second, the finish: the kuro-uchi black forged face is not a coating or a print but a genuine as-forged surface, which gives the line a rustic, artisanal appearance that most stainless production knives cannot match and which also helps with food release. Third, the handle: a Japanese wa-handle in laminated reinforced wood, lighter and more traditional in feel than a Western bolstered handle, with a reinforced blade-to-handle joint for durability. Together those make Gen a premium knife that looks and feels distinct on the board while remaining a practical everyday performer.
The Gen models
The Gen line covers the full span of everyday Japanese shapes, all sharing the same VG-10 Damascus construction, kuro-uchi finish, and laminated wa-handle. Blade shapes are given in Japanese terms with the Western equivalent; sizes are drawn from the maker's catalog. Availability of individual sizes varies by market.
Gyuto (chef's knife)
The all-purpose chef's knife and the natural centerpiece of the line, offered in 180, 210, and 240 mm. The 210 mm is the versatile default for most home and light professional use; the 240 mm suits larger boards and longer strokes. This is the shape most buyers will build a kit around.
Santoku and nakiri
The everyday Japanese kitchen pair. The santoku, offered across a wide 130 to 180 mm span, is the compact all-rounder favored in Japanese home kitchens; the nakiri, from 130 to 170 mm, is the flat-profiled vegetable specialist for clean push cuts. Both show the kuro-uchi finish to good effect on their broad faces.
Bunka and ko-bunka
The reverse-tanto, angular-tipped alternative to the santoku, prized for its pointed tip and clean lines. Gen offers a full 190 mm bunka and a compact 145 mm ko-bunka, giving the line a more contemporary profile alongside the traditional shapes for cooks who like the bunka's precision at the tip.
Petty and utility
The small-work end of the range. A 130 mm petty for detail tasks and in-hand work, plus a 160 mm utility-style blade that bridges the gap between petty and gyuto. These round out the line into a complete kit built entirely from the same VG-10 Damascus construction.
Steel: VG-10 and kurouchi
The core of every Gen blade is VG-10, the cobalt-alloyed stainless from Takefu Special Steel that defined the first wave of premium Japanese knives in the West and remains one of the best-understood high-performance kitchen steels available. VG-10 combines high carbon for edge-taking, high chromium for corrosion resistance, and small additions of cobalt, molybdenum, and vanadium that refine the grain and boost wear resistance. The practical upshot is a steel that takes a very keen edge, holds it well, and still resists staining, a balance that made it the reference point for premium stainless cutlery. We cover the metallurgy in full in our VG-10 steel guide.
Shizu Hamono does not publish a Rockwell hardness figure for the Gen line. Retailers commonly cite around 60 HRC, and a couple push to 60 to 62, which is consistent with VG-10's usual working range, but treat those numbers as retailer-sourced rather than maker-confirmed. In everyday terms it means a hard, keen, edge-retentive blade that still returns to sharpness on ordinary whetstones without difficulty, which is exactly what VG-10 is known for.
The Damascus and the kurouchi finish
Around the VG-10 core, Gen carries 33 layers of Damascus cladding, the layered stainless forged around the core and revealed by etching that gives the blade its patterned flanks. That much is common to many premium Seki knives. What sets Gen apart is that the blade is also given a genuine kuro-uchi finish, the dark, matte, as-forged surface traditionally seen on rustic carbon knives. Achieving a true kuro-uchi on a stainless Damascus blade is genuinely difficult, and the maker reportedly spent well over two years in development to do it, which is why the look is so rare in this steel. The finish is not just cosmetic: the textured black face helps food release from the blade and gives the line its unmistakable character. For the broader tradition behind the finish, our blog covers Japanese knife finishes including kuro-uchi in depth.
Market presence and availability
Gen is sold across Japan, North America, continental Europe, and parts of the Asia-Pacific region, primarily through authorized retailers and specialty kitchen and knife shops rather than mass-market channels. In Japan it reaches buyers through domestic specialty shops and craft portals; abroad it appears in the assortments of specialist Japanese-knife retailers across the United States and Canada, the Netherlands, France, and Central and Eastern Europe, and at least Singapore in the Asia-Pacific. Availability in Australia is plausible through the same specialty trade but we were not able to confirm a specific stockist there, so we flag it rather than assert it.
The distribution pattern is that of a premium Seki line: specialist rather than mass-market, sold to buyers who already know what VG-10 and kuro-uchi mean and are seeking them out. That is a narrower channel than a department-store brand enjoys, but it is also the channel where the line is best understood and most reliably genuine.
Okami estimate: we regard Gen as a well-distributed premium line within the international Japanese-knife specialty trade, recognized among enthusiasts for its distinctive kuro-uchi VG-10 construction while remaining below the largest branded names in general-buyer visibility. Methodology note: this is an approximation built from public information, namely the maker's own product pages and the line's presence across specialty Japanese-knife retailers in Japan, North America, Europe, and the Asia-Pacific. It is not based on audited sales data, and Shizu Hamono does not publish line-level distribution figures.
Sources: Shizu Hamono official Japanese and English product materials (shizuhamono.net and its English site), the Gifu prefectural product portal, and product literature and specifications from specialty Japanese-knife retailers in Japan, North America, Europe, and the Asia-Pacific. Hardness figures for the line are as published by those retailers rather than by the maker.
Gen vs its siblings
Shizu Hamono makes several lines, and the clearest way to understand Gen is by its place among them. Gen is the VG-10 tier; the other lines use different steels and sit at different price points. Two of them are worth naming so you can tell them apart on a shelf.
| Line | Core steel | Construction | Tier |
|---|---|---|---|
| Gen (玄) | VG-10 | 33-layer Damascus, kuro-uchi finish, wa-handle | Premium |
| Shikisai Miyako | AUS-8 | 33-layer Damascus, Western-style reinforced-wood handle | Mid |
| Morinoki | Molybdenum-vanadium stainless (mono-steel) | Plain forged, zelkova-wood handle | Entry / lifestyle |
The most important distinction to get right is between Gen and Shikisai Miyako. They look similar, because both are 33-layer Damascus lines, but their cores differ: Gen uses VG-10, while Shikisai Miyako uses AUS-8, a step down in the steel hierarchy. Miyako is the mid-tier Damascus line, offering the layered look at a lower price with a Western-style handle; Gen is the premium line, adding the VG-10 core and the kuro-uchi finish. If you are cross-shopping the two on appearance alone, the core steel is the deciding difference. (Both of those sibling lines are Shizu Hamono products; we do not yet maintain dedicated pages for them, so we describe them here rather than link out.)
The third sibling, Morinoki, is a different animal: a lighter, rustic everyday line in a simple mono-steel molybdenum-vanadium stainless with zelkova-wood handles, developed with attention to handle and packaging detail. It relates to Gen only as a stablemate from the same factory, sitting well below it as an entry or lifestyle line rather than a performance one. To place VG-10 in the wider steel landscape, see our VG-10 guide; for the Seki context, our Seki city guide; and for the full brand directory, our Japanese knife brands reference.
Shizu Hamono Gen FAQ
Who makes Shizu Hamono Gen knives?
Gen is made by Shizu Hamono (志津刃物製作所), a cutlery maker in Seki, Gifu Prefecture, Japan, whose modern company was incorporated in 1980 with craft roots in the late 1950s. It is a disciplined working factory that runs the full production process in-house.
What does "Gen" mean?
Gen is written with the kanji 玄, which the maker itself glosses as meaning "black" and "expert." Both senses fit the line: black for its kuro-uchi forged finish, and expert for its positioning as the maker's serious VG-10 offering. The kanji is confirmed on Shizu Hamono's own materials.
What steel is the Gen line made of?
Every Gen blade has a VG-10 core, the cobalt-alloyed Takefu stainless known for taking and holding a very keen edge while resisting stains, wrapped in 33 layers of Damascus cladding. It is a genuine premium-tier stainless construction.
How hard is the Gen steel?
Shizu Hamono does not publish a hardness figure for the Gen line. Retailers commonly cite around 60 HRC, with some listing 60 to 62, which is consistent with VG-10's usual working range, but those numbers are retailer-sourced rather than confirmed by the maker.
What is the black finish on Gen knives?
It is a genuine kuro-uchi finish, the dark, matte, as-forged surface traditionally seen on rustic carbon knives. Achieving a true kuro-uchi on a stainless Damascus blade is technically difficult, and the maker reportedly spent more than two years developing it. The textured black face also helps food release from the blade.
How does Gen compare to Shikisai Miyako?
Both are 33-layer Damascus lines from Shizu Hamono and look similar, but their cores differ. Gen uses a VG-10 core and adds a kuro-uchi finish and a Japanese wa-handle; Shikisai Miyako uses an AUS-8 core with a Western-style handle. Gen is the premium tier; Miyako is the mid tier at a lower price. The core steel is the deciding difference.
Where are Shizu Hamono Gen knives made?
All Shizu Hamono Gen knives are made in Seki, Gifu Prefecture, Japan, the country's historic blade-making center, in Shizu Hamono's own factory where the whole process runs from steel selection through final edge inspection.
What handle do Gen knives use?
Gen knives use a Japanese-style wa-handle in laminated reinforced wood, lighter and more traditional in feel than a Western bolstered handle, with a reinforced joint between blade and handle for durability.
Further reading
- The complete guide to Japanese knife finishes: migaki, nashiji, kurouchi and more
- VG10 vs SG2: choosing the best Japanese knife steel for your needs
- The ultimate guide to Damascus steel Japanese knives
- How to care for a Damascus knife: keep the pattern beautiful
Related reading
- Shizu Hamono: the maker profile, the factory behind this line
- VG-10, the metallurgy behind Gen's core steel
- Seki: the modern capital of Japanese kitchen knives
- Japanese knife brands and the makers behind them
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