...can a katana blade REALLY cut through a bullet as portrayed in many anime and video games?
Wow amazing, it cut it. Not to mention it took 7 MACHINE GUN bullets firing at the same spot to break it. If it was a "high-quality" katana, it would be much, much higher. As well the bullet is moving so it as the advantage. If the katana was moving it would have the "slicing power". ;)