Azure Silk – Hand Forged 1065 Carbon Steel Katana Sword

Azure Silk – Hand Forged 1065 Carbon Steel Katana Sword

The Aohada saya – green bark wood, the same sheath material used across our working-grade line – tells you something before the blade is ever drawn. This is not a display piece dressed up in functional clothing. Azure Silk – 青绡 – is built from the saya in, with every component chosen for the practitioner who needs a blade that performs consistently across a full training session and then a hundred more after that.

Specifications

Forged in Longquan

1065 high carbon steel sits at a practical sweet spot for a working katana. The 0.65% carbon content gives the blade sufficient hardness after oil quench – typically landing in the Rockwell C 58-60 range – while retaining enough ductility that the steel bends before it breaks under lateral stress. That is not a small distinction in a blade you plan to use. Steels above 0.8% carbon harden well but become increasingly brittle at the edge; steels below 0.6% stay tough but struggle to hold a fine working edge under repeated impact. 1065 splits the difference usefully.

The Shinogi-Zukuri (ridgeline) geometry – the classic katana cross-section with a defined ridge running the length of the blade – contributes directly to cutting performance. The shinogi redirects material during a cut, reducing drag and allowing the edge to travel cleanly through the target. The 3.2 cm width and 0.7 cm spine thickness give the blade enough structural mass to absorb impact without flex at the point of contact.

Weight, Balance, Draw

The 27 cm cotton ito wrap is firm under a two-handed grip – wound tight enough that there is no lateral give between the hands during a cut, but textured enough that the handle seats naturally without requiring a grip adjustment mid-form. The 72 cm blade length is standard for a katana worn and used by an adult practitioner. The draw from the Aohada saya is clean and consistent: the koiguchi (the saya’s mouth fitting) holds the blade without binding, releasing with a controlled resistance that supports iaido practice without fighting the practitioner on the draw.

Keeping It Sharp

After each session, wipe the full length of the blade with a clean cloth to remove oil and debris before re-sheathing. Touch up the edge with a medium ceramic rod or Japanese water stone as needed – 1065 steel re-sharpens readily and responds well to progressive grit work. A light coat of oil on the blade before storage prevents surface oxidation between uses.