Korean martial arts have comprehensive features of game, dance, self-defense, and combat skills. Their origin can be traced back to ancient rituals. Ancient martial arts are represented in the mural paintings of Goguryo royal tombs, and can also be traced back to Hwa-rang-do (youth training institute) of Shilla. In Joseon, martial arts were used in folk games and military training. Now, interest in traditional martial arts is increasing among the public and there is a large number of people who study them. Korean martial arts are not simple skills of self-defense or attacking others. They have a philosophical background. They reflect the spirit of loyalty to country and family, bravery, tolerance, and harmony between human beings and the heaven.