The Odachi sword, or Nodachi, is a massive Japanese sword traditionally used by samurai. With a blade over 3 feet long, it was designed for battlefield combat, excelling against cavalry and multiple opponents. Due to its weight and length, it required great skill to wield and was often carried across the back. Beyond warfare, Odachi swords were used in ceremonial rituals, temple offerings, and martial arts practice. Today, they are prized by collectors, historians, and martial artists for their craftsmanship and historical significance.