Yes, samurai warriors in feudal Japan did use the odachi, also known as the nodachi or field sword. The odachi was a type of large two-handed sword with an exceptionally long blade, typically measuring over 90 centimeters (around 3 feet) in length. It was characterized by its distinctive curved blade, similar to the katana but significantly longer.

The odachi was primarily employed in the battlefield by samurai warriors, particularly during the late medieval period. Its extended reach and cutting power made it effective against infantry formations and mounted cavalry. The length of the odachi allowed samurai to deliver devastating strikes from a distance, targeting multiple opponents or even cutting through several adversaries with a single swing.

Due to its size and weight, the odachi required considerable strength and skill to wield effectively. Samurai who trained with the odachi often underwent specialized training to master its techniques, including footwork, timing, and body mechanics necessary to handle such a large weapon.

While the odachi was predominantly a battlefield weapon, it was not commonly worn as a sidearm or carried in everyday life. Its size and impracticality in confined spaces made it less suitable for personal defense or ceremonial purposes. The katana and wakizashi were the more commonly used swords for samurai in those contexts.

The use of the odachi declined over time, partly due to changes in battlefield tactics and the increasing popularity of firearms. However, the odachi remains a fascinating part of Japanese sword history and is admired today for its impressive size and the skill required to wield it effectively.