American Kenpo or Kenpo Karate is a system of martial arts created by Ed Parker, characterized by the use of quick moves in rapid-fire succession intended to overwhelm an opponent. It is largely marketed as a self-defense system, and is derived from traditionalJapanese martial arts and other martial arts such as Southern Chinese kung fu found in the cultural melting pot of Hawaii.

Parker introduced significant modifications in his art, including principles, theories, and concepts of motion as well as terminology, throughout his life. He left behind a large number of instructors who teach many different versions of American Kenpo as Ed Parker died before he named a successor to his art.  http://en.wikipedia.org/wiki/American_Kenpo