Iaito swords are specifically designed for iaido, a Japanese martial art focused on the art of drawing and striking with the sword. Unlike functional or live-blade swords, iaito swords are typically made with non-sharpened or blunt blades. They are intentionally constructed with safety in mind, as practitioners perform repetitive drawing and sheathing techniques during iaido practice.

While iaito swords are not originally intended to be sharpened, there may be some exceptions. Some iaito swords are made with removable blades that can be replaced with live blades, allowing for sharpening and use in cutting exercises. However, this is not a common practice, and it is essential to consult with the manufacturer or a qualified swordsmith before attempting to sharpen an iaito sword or modify it in any way.

It's worth noting that if you are practicing iaido, the non-sharpened blade of an iaito sword is specifically designed to provide safety during training while still allowing for realistic movements and techniques. The focus in iaido is not on cutting targets but on mastering proper form, precision, and control.

If you are looking for a sword for cutting exercises or other purposes that require a sharpened blade, it is advisable to consider a functional sword specifically designed for those purposes rather than attempting to modify an iaito sword. Functional swords are constructed differently, with a focus on edge retention and cutting performance.

Always consult with experts, qualified professionals, or reputable swordsmiths for advice and guidance regarding the appropriate use, maintenance, and modifications of your specific sword.