Dr. Yoo found M5 in 1971 and developed 345 all corresponding points in hand. What is Koryo Hand Therapy? It is a technique of acupuncture discovered and developed by Dr.Yoo Tae Woo in 1971. It is administered exclusively on the hands of patients. It has its original theories or principles based on oriental medicine and is excellent in theoretical and systematical aspects. The technique takes advantages of the fact that a complete meridian system exists on the hands corresponding to a similar system on the body as whole. It has many benefits in KHT as followings; Effectiveness, Safety, Simple, Easy to use, Easy to learn, Cost effectiveness. Korean Journal of Headache 2(2):149-156, 2001