hizen

Hizen is a term given to someone with a natural tendency to positively impact the world around them, they live skillfully, train hard and for the sole purpose of self improvement., They find enlightenment in mastering skills that are deemed lethal or risky. In short you become a hizen when your dangerous skills are used to protect and better the world and to also preserver peace for all.

Learning how to throw knives powerfully does not make you hizen. You become hizen when that skill is used to resolve conflict or to preserve piece.

I saw a thief trying to hold up a store, there was a hizen inside who used martial arts to disarm and knock the guy out.

Hizen

Hizen is a Japanese word. It can be written in Kanji, as '肥前', which is the name of a region in modern Kyuushuu.
The name Hizen is derived from '火の国' which literally means Fire Nations. The reason for such a name is the high number of volcanoes in that area.
The word 'Fire' can be seen as to mean 'energy' in the Japanese language.

I went to the Hizen region during summer, it was so hot I could barely get out of the Hotel.