A blunt katana refers to a katana sword that has a non-sharp or dull blade. Unlike a sharp katana designed for cutting and slicing, a blunt katana is primarily used for training, sparring, or decorative purposes.

Blunt katanas are commonly used in martial arts training, such as kenjutsu or kendo, where practitioners focus on the form, techniques, and principles of swordsmanship rather than cutting targets. The lack of a sharp edge reduces the risk of injury during practice sessions or friendly sparring.

Blunt katanas can also be used for display or ceremonial purposes, as they are often crafted with ornate fittings and designs. These decorative blunt katanas are meant to be showcased as works of art or symbols of status and tradition.

It's worth noting that even a blunt katana can still have a pointed tip, so caution should be exercised when handling and using it. Proper safety precautions and training should be followed to prevent accidents or injuries during practice or demonstrations.