Kaji means fire — the conflagration — and this katana is a tribute to the forge itself, where ancient Japanese smiths bent fire into steel. The blade carries that heat in its hamon and its red lacquer, and the double bo-hi grooves give it the low, singing draw that lighter blades are loved for.
Forging & Steel
The blade is forged from high-carbon T10 tool steel with a wavy hamon — the temper line that marks differential hardening, giving flexibility in the spine and a hard, sharp edge. Twin bo-hi grooves are cut the length of the blade: they lighten the sword, shift the balance toward the hand, and produce a distinct sound during cutting practice that lets you hear a clean swing.
Mounting & Fittings
The copper tsuba is carved as a dragon, a symbol of wisdom and strength, set against a red-lacquered saya with red-and-white sageo signalling passion and courage. The tsuka is wrapped in genuine white shagreen with a copper menuki kit and two bamboo mekugi over a true full-tang blade, for a secure grip.
Specifications
| Component | Detail |
|---|---|
| Blade steel | T10 steel with corrugated hamon, double bo-hi, sharpened blade |
| Tsuba | Copper carved in the shape of a dragon |
| Saya | Red-lacquered wood with red and white sageo |
| Tsuka | Genuine white shagreen |
| Menuki | Copper menuki kit |
| Mekugi | 2 bamboo mekugi |
Dimensions
| Measurement | Value |
|---|---|
| Total length | 103 cm |
| Blade length | 72 cm |
| Handle length | 27 cm |
| Blade width | 3.2 cm |
| Blade thickness | 0.7 cm |
| Weight | 1.2 kg |
Is it battle-ready?
Yes. Kaji is a sharpened, full-tang T10 blade with a real corrugated hamon and twin bo-hi — a functional cutting katana, lightened by the grooves for a fast, singing draw at 1.2 kg. Its dragon guard and red lacquer also make it a bold display. For more bold T10 work, compare the demon-themed Murasaki no Akuma and the meteor-themed Katana Ryousei in our katana range.
