The Kotegiri Masamune carries a name that feels like a blade’s edge—sharp, direct, and unmistakably tied to the most legendary swordsmith in Japanese history. While historians debate the exact paper trail of this sword in Nobunaga’s personal collection, it has long been celebrated as one of his prized possessions. The name "Kotegiri" literally means "sleeve-cutter," earned from a legendary feat where the blade sliced through a warrior’s armored forearm guard (kote) in a single, effortless stroke. In the brutal world of the Sengoku period, a sword that could ignore armor wasn't just a tool; it was a superpower.

Masamune-school blades are the "supercars" of the samurai world, famous for their "Chinie" (sparkling crystal) grain patterns and edges that stay sharp through the chaos of battle. These blades were forged using a complex process of folding different grades of steel together, creating a weapon that was hard enough to hold a razor edge but flexible enough not to snap when hitting a steel helmet. The Kotegiri follows the classic Katana profile: a curved, single-edged blade designed for the "draw-cut," a lightning-fast motion where the act of unsheathing the sword and striking the enemy happens in one fluid blur.

For a revolutionary leader like Oda Nobunaga, owning a Masamune was a massive political power move. Nobunaga was famous for breaking the "old rules" of Japan, but he also understood that to lead, he needed to command respect through tradition. The Kotegiri stood at his side as he marched into Kyoto and began the bloody process of unifying a fractured nation. It represented the "Great Unifier's" dual nature: a man who embraced modern guns and global trade yet still carried the finest steel the ancient world could produce.

Today, the Kotegiri Masamune is honored as an "Important Cultural Property." Unlike other Masamune swords held in public museums such as the Tokyo National Museum (e.g., Kanze Masamune), there is no publicly verified location for the Kotegiri Masamune. It may reside in a private collection or be part of historical archives, but such information is not disclosed to the public. The sword serves as a bridge between the myth of the samurai and the gritty reality of the 1500s. It remains a silent witness to the moment Japan began to transform from a collection of warring states into a single, unified nation.