Mishima Style Fighting Karate (三島流喧嘩空手 Mishima-ryū Kenka Karate) is a fighting style that is used by many characters in the Tekken series.
Signature moves of this fighting style include "Rising Uppercut", "Dragon Uppercut", "Tsunami Kick", "Flash Punch Combo", "Demon Slayer", "Spinning Demon", and "Demon Scissors". They also all share a 10 Hit Combo (f,f,N,2,1,2,2,3,4,4,1,2,1), although Heihachi Mishima did not obtain this 10 Hit Combo until Tekken 3.
While the style itself does not migrate outside the Mishima family, there have been instances in the older games, most notably the first Tekken game, where other characters would have the same moves, such as Armor King who was able to use moves similar in animation, properties, and damage as the Dragon Uppercut and Rising Uppercut.
As the series progressed, the moves became more and more dissimilar among the practitioners, e.g. Heihachi performing the Flash Punch Combo in one way, but Kazuya doing it in another way, when initially, the two characters had executed the moves exactly the same. Also, the fighting style branched out more with each character gaining even more moves that were uniquely their own, effectivively creating different variations of the same fighting style.
Despite Mishima Style Fighting Karate being a fictional martial art, its influences do originate from real martial arts. Mishima Style Fighting Karate is heavily influenced by the Goju-ryu and Shorin-ryu styles of karate.