Hokuto Shinken

Hokuto Shinken (lit., The Divine Fist of the North Star; butchered by Holly, The Holy Fist of Polaris) is an immensely powerful martial art used by Kenshiro. It was invented by the Chinese as the ultimate assassination art, and has been handed down a long line of successors.

Basic Principle
The core concept of Hokuto Shinken is the manipulation of the human body's 702 pressure points. When pressed fast enough, the pressure points cause certain involuntary physiological responses. Hokuto Shinken focuses on the most deadly of these responses, generally through pressing a large majority of the points in a very short span of time. In order to do this, the user must channel ki into their limbs to increase their striking speed.

Techniques

 * Hokuto Hyakuretsu Ken (Hunded Crack Fist of the North Star/ One Hundred Strikes Punch of the North Star)- The user channels ki into their upper body, generally causing some distress to whatever clothing might be there. The user then uses a combination of extremely rapid punches and finger strikes to press target's pressure points. After a delay of ten seconds, the target's internal organs fail catasrophically, often causing external ruptures.
 * Hokuto Aura Sealing Fist- A technique, possibly invented on the spot, used by Kenshiro against Katniss while the latter was corrupted by the One Ring. Visually, the technique is similar to the Hyakuretsu Ken, but after a short delay the target's aura is forcibly retracted, making them indetectable to ki-sensing opponents (or Rings of Power).

Trivia

 * Holly figured out how Hokuto Shinken worked after watching Kenshiro use it on Katniss. Her attempts at using the art were less-than-successful, however.