Emerarudo is the Japanese reading of emerald — エメラルド — and like the gem it is named for, this blade is about clarity and lasting hardness. It is a mid-range katana defined by an elegant T10 tool-steel blade known for strength and edge retention.
Forging & steel
The blade is forged from T10 steel and carries a distinctive claw-motif hamon running the length of the 71 cm edge — the temper line born in the quench, drawn here into a clawed pattern by the way the clay is laid before hardening. T10’s high carbon content gives it the hardness to take and keep a keen edge, while the differential temper leaves the spine tougher so the blade absorbs the shock of a cut rather than chipping. That balance of a hard edge and a resilient body is what makes the steel a favorite for cutting katana at this tier.
Fittings
A finely sculpted copper tsuba guards the hand. The saya is lacquered wood hung with a cotton sageo; the tsuka wears genuine white shagreen over a copper menuki for a secure grip. At 103 cm with the saya and 1.4 kg, it is well-balanced and easy to handle, equally at home in a collection or in training.
Specifications
| Blade steel | T10 steel with claw-pattern hamon |
|---|---|
| Tsuba | Finely sculpted copper |
| Saya | Lacquered wood with cotton sageo |
| Tsuka | Genuine white shagreen, copper menuki |
Dimensions
| Total length | 103 cm |
|---|---|
| Blade length | 71 cm |
| Blade width | 3.2 cm |
| Blade thickness | 0.75 cm |
| Handle length | 26 cm |
| Weight | 1.4 kg |
Is it battle-ready?
Yes. T10’s hardness and the clay-drawn hamon make Emerarudo a capable cutter as well as a display piece, and its balance suits training. It shares its temper-line character with the Ray and the flame-hamon Ikoi. Browse the wider katana range.
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