This custom samurai sword is hand forged using traditional Kobuse steel construction, one of the classic techniques used in Japanese sword making. In the Kobuse method, a hard high‑carbon steel jacket forms the outer layer of the blade, while a softer steel core runs through the center. This structure creates a blade that balances sharpness with durability and flexibility.

The hardened outer steel provides excellent edge hardness and cutting performance, allowing the blade to maintain a sharp edge. The softer core inside the blade helps absorb shock and improves overall toughness, reducing the risk of breakage during use. This traditional construction reflects the Japanese swordsmiths’ goal of achieving an ideal balance between strength and resilience.

Each blade is crafted using a traditional clay tempering process, which produces differential hardening along the cutting edge. This technique creates a harder edge for superior cutting ability while maintaining a tougher spine for durability and flexibility. The process also produces a visible and natural hamon (temper line), highlighting the beauty and authenticity of the blade.

This sword is available in three classic Japanese blade sizes to suit different preferences:

Katana – The iconic long samurai sword, known for its balance, reach, and powerful cutting performance.

Wakizashi – A medium-length companion sword that offers versatility and excellent control.

Tanto – A compact short blade valued for its strength, precision, and durability.

To further customize the appearance of the blade, two traditional polishing styles are available:

Sashikomi Style Polish – A traditional polishing method that reveals the hamon naturally while preserving the authentic character of the blade.

Hadori Style Polish – A polishing style that enhances and highlights the hamon with a brighter and more defined contrast.

Each sword is individually forged and finished by skilled craftsmen, ensuring that every blade is unique. Combining traditional Kobuse construction with careful heat treatment and refined polishing techniques, this custom samurai sword offers both functional performance and traditional craftsmanship, making it ideal for collectors, martial arts practitioners, and enthusiasts who appreciate the heritage of Japanese blades.

Kobuse Steel Blade Technical Specifications