T10 Steel Katana with Clay Tempered Blade, Real Hamon in Black Lacquer Saya & Gold-Black Chrysanthemum Tsuba

The 28.3-inch nagasa is forged from T10 carbon steel, clay tempered and water quenched to achieve 60 HRC hardness with a genuine hamon line visible along the blade's surface. The differential hardening process leaves a harder edge and a more resilient spine, producing the characteristic wavy temper line that distinguishes authentic heat treatment from purely cosmetic finishes. The hand-finished, sharpened edge runs full tang through the handle assembly. If you're exploring the broader range of Black T10 katana options, this piece sits at the more detailed end of the spectrum.

The tsuka measures 10.2 inches and is wrapped in black ito cord over black samegawa in a traditional diamond pattern. Black menuki hardware is seated beneath the wrap, visible at intervals along the grip. The overall handle construction follows koshirae-style mountings, giving the sword a complete, matched set of fittings rather than a bare-bones assembly.

The tsuba is cast from alloy in a gold-black two-tone finish with a chrysanthemum relief pattern carved across its face. The circular guard carries fine floral detailing that contrasts the sword's otherwise all-black color scheme. The gold rim provides a clean visual break between the tsuka and the blade, with the black inlaid details grounding the design in a more subdued register.

The saya is constructed from hardwood and finished in piano lacquer for a deep, high-gloss black surface measuring 30.3 inches. A black sageo cord is tied at the koiguchi in a multi-loop knotted pattern, adding texture and a functional cord tie-off point. The lacquer finish is consistent and smooth across the saya's full length.

Total overall length is 40.5 inches and the sword weighs 2.65 lbs. Packaged in a 43 x 4 x 4-inch box at a shipping weight of 4 lbs, this katana is suited for collectors and enthusiasts who want a piece with verified clay tempering, real hamon, and a cohesive black-and-gold presentation. For those considering longer blade formats in a similar style, O Katana offers extended blade options worth comparing.