Hapkido
The basics of Hapkido:
Hapkido is a martial art derived in Korea.
Editor's Note: Much of early Hapkido history is difficult, if not impossible to establish accurately and is often based on oral recitations that cannot now be substantiated. We leave it to the informed reader to draw their conclusions as the the validity of claims made. A careful reader will note that there are contradictions contained in various contributor's versions of the same events. It is clear that both Ji Han Jae and Choi, Young Sool were major contributors to this art and that Choi, Young Sool's style was probably closer to the source that is may be shared with Aikido while Ji Han Jae's style clearly added more kicks.
Hapkido is a martial art of Korean origin. Its name means literally "The way of coordination and internal power." Hapkido is a complete martial art in that it consists of: dynamic striking and kicking techniques, very similar to Tae Kwon Do, both hard and soft style deflection techniques, throws, takedowns, ground-fighting, and extensive joint locking techniques. Hapkido is the combination of two Korean Martial Arts - Yool Sool which comes from the Japanese art known as Daito-Ryu Aiki-Jutsu and Tae Kyon which is an ancient Korean Kicking Skill that was widespread during the time of the Three Kingdoms.
text courtesy of: http://modernhapkido.org/history.htm