Kobuse Blade

What is a Kobuse Blade?

A Kobuse blade refers to a traditional Japanese sword construction method known as Kobuse-zukuri（甲伏造）, in which a blade is forged from two types of steel: a hard cutting core and a softer outer jacket. This structure balances sharpness and durability, and is one of the most refined composite forging techniques in classical Japanese swordsmithing.

A Kobuse blade is forged with a high-carbon steel core wrapped in softer steel, allowing for a sharp, durable, and impact-resistant weapon. This dual-layer construction demonstrates the mastery of traditional Japanese swordsmiths in achieving both performance and beauty.