Katana – Heavy Blade Wide Manganese Steel Sword 黒雷 Kokurai
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This is Kokurai — a wide-bodied black handle katana forged for brute cutting power and refined balance. With a 73cm blade, 3.5cm width, and 35cm tsuka, this heavy-duty sword is designed for serious tameshigiri and high-resistance targets.
Crafted from high manganese steel and quenched at high temperature, the blade features twin bohi for reduced drag and amplified sound feedback. The widened edge geometry and forward weight make it ideal for clean cuts on dense targets, while the extended handle enhances two-handed control and momentum transfer.
Finished with brass fittings and horn-tipped saya mouth, this heavy blade katana is a perfect fusion of function and form — built for practitioners who want force with finesse.
Specifications
| Material | High Manganese Steel (hand-forged, high-temperature quenched) |
|---|---|
| Blade | 73 cm, 3.5 cm wide, dual bohi, full tang, hand-polished |
| Handle (Tsuka) | 35 cm, real ray skin under black cord wrap |
| Fittings | Brass tsuba, fuchi, and kashira with storm motif |
| Scabbard (Saya) | Hand-lacquered hardwood, buffalo horn koiguchi (mouth ring) |
Dimensions
| Overall Length | 118 cm (46.5 inches) |
|---|---|
| Blade Length | 73 cm (28.7 inches) |
| Handle Length | 35 cm (13.8 inches) |
| Blade Width | 3.5 cm (1.38 inches) |
| Weight without Scabbard | 1.2 kg (2.65 lbs) |
| Total Weight | 1.6 kg (3.53 lbs) |
Features
- Wide blade for increased cutting weight and stability
- Dual bohi design improves handling and delivers sharp tachikaze ("cutting sound")
- 35cm tsuka for leverage, ideal for large target slashes
- Brass dragon tsuba and lion-themed kashira bring martial elegance
- Polished black saya with buffalo horn koiguchi for durability
- Perfect for strength-based tameshigiri, collection, or functional display
"Weight demands control. Precision demands presence."
Kokurai is a sword that rewards deliberate technique with uncompromising power — for those who cut with intention.
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Who are we
Our fearless founder, caught the katana bug in Seki City. But his true obsession lies with ancient Chinese weapons. Inspired by legendary blades like the Goujian Sword and the Ganjiang and Moye Swords, Ryze is on a mission to showcase the beauty of Asian craftsmanship to the world.
Our 11 skilled artisans pour their heart and soul into every blade. From heavy metal enthusiasts to zen masters, each brings their unique personality to the forge, crafting katanas and Chinese swords that are more than just weapons - they're works of art.
Our Head of Research and Development, is the sensei of swordsmithing. With decades of experience and a love for traditional craftsmanship, he ensures every NIMOFAN blade is a masterpiece. Off the clock, he tends to his bonsai collection and practices calligraphy.
Leads our customer service team, ensuring every interaction with NIMOFAN is as exceptional as our products. With her contagious laughter and ability to brighten anyone's day, Emily is the heart of our team.