Full Contact Karate/Knock Down Karate

Full contact karate is a wide term used to differentiate between competition formats of karate where competitors spar (also called Kumite) full-contact and allow knockout as winning criterion, and those competitions that use light contact/semi contact point sparring where a knockout is regarded as a foul. The term is also by extension used to differentiate between schools/styles of karate dedicated to such full contact competitions, and schools/styles that are not.

http://en.wikipedia.org/wiki/Knockdown_karate

Knockdown karate
Another major format of full-contact sport karate is known as knockdown karate or sometimes Japanese full contact karate. This style of sport fighting was developed and pioneered in the late 60ies by the Kyokushinkai karate organization in Japan, founded by Masutatsu Oyama. In fighting the competitors traditionally wear no gloves, padding or body protection other than groin guards (although local regulations sometimes enforce exceptions to this tradition), but is bare knuckle fighting. Punches to the face and groin and joint attacks are prohibited but all bare-knuckle and elbow strikes to the body and limbs (with the exception of joints), and kicks (including kicks with the knee) against legs, arms, body, head and face are permitted, as are sweeps. A score is only made by knocking your opponent out, down to the floor, or incapacitating them, or by sweep and controlled follow-up for half a point, and unless there is a knockdown or sweep, the bout is continuous. Unlike American full contact karate you do not count clean hits, but only scores the effect of the hits.

Although this sport format originate with the Kyokushinkai karate organization, it has spread until it today is used by many karate organizations. Karate styles embracing these rules are often called knockdown karate styles, and these include both organizations that originated from Kyokushin, such as World Oyama Karate, Ashihara Karate, Enshin Karate, Shid?kan, godokai, Karatedo Shurenkan and Seidokaikan (the style that originated the K-1), as well as styles such as Kansuiryu Karate, Byakuren karate and many others that originated independently from Kyokushin but has adopted the competition format. Though severely divided by rivaling styles and organizations (several of which use their own minor variations of the basic rules), and lacking a unifying sport organization, the sport of knockdown karate is today common all over the world.

http://en.wikipedia.org/wiki/Knockdown_karate