I watched a video called The Problem with 3 Swords. The character Roronoa Zoro in the One Piece anime uses three swords to attack. He fights with two swords in each hand and one in his mouth. This is a video to see if he can really fight in the real world with a sword in his mouth. A normal person cannot even hold a heavy sword in his mouth. In the anime, Zoro uses his sword to cut through cannonballs. It is said that the jaw force required for this is about 2000 tons. In other words, he has a jaw strength 1,000 times greater than that of a crocodile.

I thought it would be better to bite with the jaws than to attack with the sword. However, I don’t mind the three-sword style because it looks cool.

The most important thing I have learned is to always be skeptical. By questioning the obvious, you can make new discoveries.