Karate originated in China in the 6th century AD when a Buddhist monk taught a system of martial arts exercises. These teachings later influenced many Chinese martial arts styles and were introduced to Okinawa. There are now four main karate styles practiced worldwide - Kyokushin, Shotokan, Wado ryu, and Shito ryu. Karate is practiced globally as both a martial art for self-defense and a competitive sport, with major international tournaments held regularly.