[He's about to protest that she didn't hurt him, but Yuta's already moving the conversation along, so he just smiles and shakes his head. No harm done! Permanently, anyway.]

A katana is an eastern sword, isn't it? I know a swordsman from my world who's skilled with one. As for hand-to-hand combat, why do you hold back...?

[He can guess it might be due to his naturally timid personality, but it would be interesting to get Yuta's own view on the matter.]