A nodachi is a type of Japanese sword characterized by its significantly longer blade compared to a standard katana. The term "nodachi" translates to "field sword" or "field cleaver" in Japanese. It is sometimes referred to as an ōdachi, which means "great sword" or "large sword."

The nodachi typically has a blade length exceeding 90 centimeters (35 inches) and can reach lengths of over 120 centimeters (47 inches) or more. The handle (tsuka) of a nodachi is longer as well, allowing for a two-handed grip. Due to its large size and weight, the nodachi was primarily used by skilled samurai warriors on the battlefield to strike from a distance or to target multiple opponents simultaneously.

The nodachi is characterized by its long, curved blade and its use as a slashing weapon. It required considerable strength and skill to wield effectively due to its size and weight. The extra length of the nodachi provided an advantage in reaching opponents from a distance while maintaining the cutting power of a traditional sword.

It's important to note that the nodachi was not as common as the katana or other standard-sized swords. Its use was limited to certain historical periods and specific situations on the battlefield. Today, nodachi swords are primarily found in museums, private collections, or as decorative pieces rather than actively used weapons.

The nodachi holds historical and cultural significance as a symbol of the samurai warrior class and their martial prowess. Its larger size and distinctive appearance contribute to its allure and fascination among enthusiasts of Japanese swords and martial arts.