For more information on Heian Sandan and the Heian series of kata please refer to Heian Shodan. This kata appears to have remained fairly close to the original though makes use of the back stance (kokutsu dachi) over the cat stance (neko ashi dachi). The Shotokan version has also added three stomping attacks, supposedly designed to attack an opponent's thigh or knee, that are missing in the original. The form introduces moves and concepts useful for close quarters combat, particularly for dealing with grabs.