This is not an authentic martial art, it's from Fist of the North Star.
Hokuto Shinken is a 2000 year old Chinese Martial Art. It was developed on the small island of Shura by the skilled Shuken. The technique of the Hokuto art focuses on a person's pressure points, called 'tsubos'. Most commonly, these moves will affect the body from within, whether it is killing or healing. Passed from one generation to the next, there can only be one successor to Hokuto Shinken's master. The other unfortunate students must give up the Hokuto art, or have their fists broken and memories erased.