Blue Blade Katana Sword - Manganese Steel Full Tang with Brass Fish Tsuba in Black Saya

This blue blade katana features a full tang manganese steel blade with a vivid blue finish that transitions into a bright edge. A prominent white hamon line runs the length of the blade in an irregular zigzag pattern, creating a dramatic contrast against the deep blue steel. The overall length measures 41 inches and the sword weighs 4 pounds, giving it a substantial presence.

The 11-inch tsuka is built on a hardwood core wrapped in black PU samegawa, then bound with black cotton cord in a traditional diamond crosshatch pattern. The layered wrapping provides both texture and grip, while small red-toned mekugi pins are visible through the samegawa for added detail.

A round brass tsuba serves as the centerpiece of the fittings, featuring a raised koi fish relief set against a background of flowing scrollwork and waves. The brass carries a warm antique patina that pairs naturally with the matching fuchi and kashira end caps. These coordinated fittings from our Blue Katana Sword collection tie the handle and blade sections together visually.

The hardwood saya is finished in a deep black lacquer with a fine speckled texture that catches light subtly. A black braided sageo cord is tied in a decorative knot near the mouth of the scabbard, and the koiguchi transitions cleanly to the brass habaki at the blade collar. This dark saya pairs well with other pieces in our Black Sageo Japanese Samurai Swords lineup.

From the blue steel blade to the brass koi tsuba and black lacquered saya, each element follows a cohesive dark-and-metallic color palette. At 41 inches overall with a 4-pound weight, this full tang katana is built as a collectible display piece that rewards close inspection of its layered details.