Kokuga Katana - 黒牙

Handcrafted Kokuga Katana in 1060 carbon steel with a visible hamon temper line. Full tang, sharpened. Polished blade with gunome hamon pattern, zinc alloy tsuba with organic rock-texture finish, brass habaki, black cotton ito over black synthetic rayskin, black quilted saya with diamond matelassé pattern and leather carry strap with metal ring. Gold-tone kashira accents. Includes horn-style bronze display stand on dark wood base. Tactical, stripped-back, built for handling — not just display.

Kokuga Katana Specifications

Visible Gunome Hamon

The polished blade carries a gunome hamon — a temper line with rounded, repeating lobes along the cutting edge. The pattern is prominent on this blade: wide, well-defined lobes that catch light and create a clear visual boundary between the hardened edge and the softer spine. On a stripped-back sword like the Kokuga katana, the hamon is not just a feature — it is the decoration. No colored finish, no engravings, no coatings. Just steel, polish, and the metallurgical line left by the hardening process.

Quilted Black Saya with Carry Strap

The saya is wrapped in a diamond matelassé (quilted) texture — repeating black diamond shapes covering the full scabbard surface. The pattern references padded armor and tactical gear rather than traditional lacquerwork. A leather carry strap with a metal ring attaches near the koiguchi, turning the saya into something you can sling rather than only display. The strap shifts the Kokuga katana from pure display piece toward functional carry sword — the kind of blade a samurai would have worn, not just mounted. Historically, the katana was part of a paired sword system (daishō) that samurai carried daily as both weapon and social marker.

Tactical All-Black Design

Black tsuba, black ito, black rayskin, black saya, black strap — the only breaks in the monochrome are the polished steel blade and the brass habaki. The zinc alloy tsuba has an irregular organic texture — rough, rock-like, not polished smooth. It reads as raw material rather than finished ornament, consistent with the tactical identity of the design. The brass habaki provides the single warm accent: a clean gold rectangle at the blade-guard junction. If you're choosing your first katana and want something that looks ready to use rather than ready to display, this is the direction.

Kokuga — Black Steel Heritage

Kokuga (黒鋼 — "black steel") names the blade's philosophy: no ornamentation, no color, no franchise association. This is a sword in its most reduced form — steel, grip, scabbard, function. The quilted saya and carry strap borrow from military and tactical traditions rather than ceremonial ones. The Kokuga katana sits closer to a working sword than a display replica, even though the 1060 carbon steel and visible hamon give it more substance than most "tactical katana" on the market.

Display

Ships with a horn-style bronze stand on a dark wood base. The all-black Kokuga disappears into dark backgrounds and pops against light ones — choose your display context accordingly. The quilted saya texture gives photographers something to work with even in monochrome. Pair with the Full Black (lacquer finish) for a dual-black display showing two different approaches to the same palette, or contrast against the White Katana.

Frequently Asked Questions

What is a gunome hamon?

Gunome is a hamon pattern featuring repeating rounded lobes — semicircular shapes that create a rhythmic wave along the blade's cutting edge. It is one of the traditional hamon styles in Japanese swordsmithing, distinct from the straight suguha or the clove-shaped choji.

What is the carry strap for?

The leather strap with metal ring allows the saya to be carried rather than only displayed. It attaches near the koiguchi and lets the sword hang from a belt or shoulder, referencing how samurai historically wore their katana at the waist during daily life.

Is this Kokuga katana sharp?

Yes. The 1060 carbon steel blade is hand-sharpened and functional. Handle with care, store in the saya, and check local regulations before ordering.

Is the quilted pattern leather?

The quilted diamond pattern on the saya is a textured covering applied over the solid wood scabbard. It resembles matelassé or padded leather in appearance and texture.

Does this come with a tanto?

No. This listing includes the katana only. It is designed with a daishō-inspired aesthetic — the quilted saya and carry strap reference the paired-sword system — but ships as a single blade.