Katana – High-Toughness Manganese Steel Tactical Black Blade | Bosō Ninja

【Overview】

This katana, known as the Bosō Ninja, is a high-performance sword inspired by stealth, durability, and modern tactical aesthetics. Forged from high-toughness manganese steel and finished with a non-reflective black blade, it combines traditional Longquan craftsmanship with a bold, functional design suitable for collectors, martial artists, and striking interior display.

【Blade & Craftsmanship】

The blade is hand-forged from manganese steel, renowned for exceptional flexibility and impact resistance. Using traditional Longquan forging methods, the blade undergoes multiple stages of forging, heat treatment, shaping, and hand polishing.

An integrated full-tang (Tiger Tail) construction enhances structural strength, while a full-length bo-hi (fuller) reduces weight and improves balance. The blackened heat-treated finish minimizes reflection, reinforcing the sword’s tactical character.

【Design & Mountings】

The cutting edge features a distinctive electric-pattern double-line polish, forming lightning-like decorative lines that add visual intensity without compromising function. An antique bronze–style tsuba complements the dark blade, creating a restrained yet aggressive visual balance.

【Handle & Saya】

The sword is paired with an exclusive ninja-style saya crafted from natural hardwood. Designed specifically for this model, the scabbard enhances both visual identity and secure storage, making it suitable for handling, display, and collection.

【Performance】

This katana delivers sharp and reliable cutting performance, easily slicing through plastic bottles and tatami mats. Its defining advantage lies in manganese steel’s toughness—the blade can flex up to 90 degrees and return to true, making it ideal for users who prioritize durability and real-world resilience.

【Specifications】

Overall length: 103 cm (40.6 in)

Blade length: 72 cm (28.3 in)

Handle length: 27 cm (10.6 in)

Blade width: 3.2 cm (1.26 in)

Blade thickness: 0.7 cm (0.28 in)

Total weight: 1.2 kg (2.65 lb)

Net weight: 1.0 kg (2.20 lb)

【Usage & Gift】

Suitable for collections, martial arts practice, self-defense training, fitness cutting, and bold interior display. A distinctive choice for those seeking durability-focused Japanese swords with a modern edge.