Steel Wave – Hand Forged 1065 Carbon Steel Katana Sword

Steel Wave – Hand Forged 1065 Carbon Steel Katana Sword

Genuine rayskin under a tight cotton ito wrap changes the character of a handle in a way that matters when your grip matters most. The Steel Wave pairs that handle construction with a proven 1065 high carbon steel blade – oil-quenched, ground to a shinogi-zukuri (ridgeline) profile, built for consistent, repeatable performance under working conditions.

Specifications

Forged in Longquan

1065 high carbon steel has earned its place as a standard for working katana because it delivers where it needs to: the carbon content (approximately 0.65%) produces a blade that through-hardens cleanly during the oil quench to a consistent Rockwell 58-60 hardness along the full length, and that hardness level sits in the zone where edge retention and toughness coexist without compromise. The oil quench, slower than water, reduces the thermal shock gradient and produces a blade less prone to warping or surface cracking during hardening – a practical advantage for a tool that will see regular use.

The shinogi-zukuri geometry – a ridgeline running the length of the blade that separates the flat ji (upper panel) from the ha (edge bevel below) – is the right profile for this steel and this application. It gives the blade structural depth above the edge and a predictable, consistent bevel that responds well to maintenance sharpening. The 3.2 cm blade width and 0.7 cm spine thickness are proportions with nothing wasted and nothing missing.

Weight, Balance, Draw

The same (rayskin) grip underlayer on the Steel Wave is the detail that elevates this handle. Rayskin’s dense nodular surface is incompressible – where a plain wood handle can shift and compress over time, same holds its geometry, and the cotton ito (handle wrap) locked into those nodes does not migrate or loosen through repeated use. The 26 cm handle accommodates a full two-hand hold with room to settle the grip precisely, and the draw from the high-gloss lacquered hardwood saya across the full 102 cm assembled length is smooth, with the curve of the katana working in your favor from the first inch of movement.

Keeping It Sharp

Wipe the blade with a clean cloth and apply a thin coat of choji or mineral oil after every session – 1065 is reactive to moisture and will show surface rust quickly if left unprotected. Sharpen with whetstones, maintaining the original bevel angle; this steel responds well to hand-sharpening and will take a clean, acute edge with proper technique. Keep the saya dry to preserve the lacquer finish over time.