[That makes him laugh. Riiight, sometimes he forgets about those things.]

Well, kendo is like a sport nowadays in my world. They don't fight seriously or to death, both opponents use the same style of words... And anyway they can still hurt a lot, they aren't mere sticks for someone who knows how to use them.

Kendo is a style of martial arts based in the sword-fighting techniques used by samurais. It's a rather modern term but basically every samurai knows kendo, even if they don't call it that way.

[At least as far as he knows.]