Hapkido is a Korean self-defence oriented martial art. Although there are some sport competitions, it is far more oriented towards real self-defence and taught as a traditional martial art. It is used by the Korean police and special forces.

Most active masters: Lee Chang Soo, Yoon Sae Kwon

Its name is similar to Aikido, aiki / apki, and this denotes in both cases the internal energy used. In other words the martial art derives its power through body coordination with relaxed muscles rather than pure muscle mass. Hapkido uses a mix of kicks, very similar to Taekwondo kicks, and joint locks, very similar to those done Aikido. The joint locks are however often done more violently, and many practitioners are taught to apply until the point of near breakage even in daily training. The practice of very difficult kicks mean that the practitioners are very fit and fast, and have dangerous legs which can be very surprising in self-defence. This combined with the locks makes Hapkido into a very solid self-defence.