T10 Carbon Steel Katana with Real Hamon in Black & Gold Koshirae - Full Tang, 28.74" Blade

The 28.74-inch T10 carbon steel blade is the centerpiece of this full tang katana, ground and heat-treated to 62 HRC. A genuine hamon line - the boundary pattern produced during differential tempering - runs the length of the blade, visible as a flowing contrast between the hardened edge and the softer spine. The nagasa measures 28.74 in., total sword length reaches 40.55 in., and overall weight sits at 2.8 lb., putting it in the range of a properly proportioned display piece with a historically accurate profile. For collectors exploring the Gold T10 Carbon Steel Katana category, this build represents the full koshirae treatment applied to the T10 platform.

The tsuka is 10.62 in. long and built over authentic white rayskin (samegawa), whose raised nodules provide a natural grip surface under the wrapping. Black cotton ito is applied in a traditional diamond-pattern wrap, exposing the white samegawa at regular intervals - a classic combination that reads clearly in the image. The handle color reads black-and-white with no ambiguity, consistent with the property data.

The gold-tone alloy tsuba features an ornate scroll theme with a textured, pitted surface visible in the close-up image - circular negative spaces and raised detailing give it substantial visual depth. A matching gold seppa sits between the tsuba and blade collar, keeping the hardware palette unified. The tsuba's warm gold finish contrasts directly against the black ito and matte black saya, anchoring the piece's two-tone identity.

The saya is formed from hardwood and finished in a matte black lacquer coat, 29.92 in. in length. The koiguchi and kojiri are fitted in real horn - a traditional choice that resists chipping at the points of most frequent contact. A black-and-gold braided sageo is knotted at the kurikata, echoing the handle's color scheme and completing the koshirae ensemble. Collectors looking at the Black Antique Katana collection will recognize this saya treatment as consistent with high-quality antique-style presentation.

At 40.55 in. overall, 2.8 lb. in hand, and built to koshirae standards with matched hardware throughout, this T10 katana brings together blade performance data, authentic fittings, and a cohesive black-and-gold visual language into a single, well-resolved piece suitable for display or study.