Nodachi

The o dachi or nodachi was a longer version of the Japanese tachi. Reports vary, but typically they might be considered approximately 5 to 5 and 1/2 feet long.

There are images of Edo period nodachi with extremely wide blades but there is little evidence of their battlefield use. Other reports indicate that during an invasion of Korea, the samurai sometimes carried huge swords made of wood covered in silver foil as a moral crushing piece of propaganda