Manganese Steel Blue Blade Straight Katana with Wolf Saya & Black-Gold Geometric Tsuba

The blade is forged from manganese steel and finished in a deep, even blue that runs from the base to the straight tip. A wave-pattern hamon traces the edge, creating a layered visual rhythm where dark steel meets the bright hand-finished bevel. The full-tang construction extends uninterrupted through the handle, giving the piece solid structural integrity and a balanced feel in hand.

The tsuka is wrapped in black-and-white PU samegawa as the base layer, then bound with black cord ito in a classic diamond cross-wrap. The white samegawa panels show through the gaps in the wrap, echoing the white-and-blue color story carried across the full koshirae. The menuki sit low beneath the cord, keeping the profile clean and grip consistent.

The iron tsuba is one of the most distinctive elements of this build. Circular in form with large open cutouts arranged in a balanced geometric pattern, the guard draws heavily on structural contrast - dense black iron framing negative space, with a gold honeycomb-textured habaki collar sitting just below. The black-gold pairing anchors the handle-to-blade transition with visual weight.

The white hardwood lacquer saya is where the design becomes fully narrative. The scabbard surface is painted with a detailed wolf and dragon scene - a wolf rendered with photorealistic blue eyes looks out from storm clouds and swirling energy rendered in gray-blue ink wash tones. This is not a repeating pattern but a single continuous illustration that gives the saya the quality of a painted artwork. A black sageo cord is knotted at the kurikata, completing the Blue Sword koshirae presentation.

At 41 inches overall and 3 lb, this straight-edge katana is proportioned for display and collector use. The koshirae-style fittings, painted saya, and blue manganese steel blade make it a cohesive statement piece for anyone drawn to Japanese sword aesthetics with a contemporary edge.