The Odachi sword and Nodachi sword are often considered similar Japanese great swords, but subtle differences exist. An Odachi is typically known for its exceptional length and ceremonial or display purposes, while a Nodachi was primarily designed for battlefield combat against cavalry and infantry. Both feature long blades and impressive reach, but the Nodachi emphasizes practical military use, whereas the Odachi is often associated with prestige, craftsmanship, and symbolic significance in Japanese history.