(That may be, but having great skill in such does not count as a superpower despite superpowers being capable of being used in conjunction with high unarmed combat skill. That's like saying skilled boxers have superpowers. You call that valid?)
The ability to possesses great skill in unarmed combat. Sub-power of Enhanced Combat.
Enhanced Hand-to-hand Combat
Master Martial Artist
The users excel in melee attacks without wielding weapons. Rather than relying on weapons or equipment, they draw on their own strength and skill to fight. Users are able to use different styles of martial arts, they can also perform many different combination strikes, counters, and disarm their foes with their bare hands.