The origin of Reiki goes back several thousand years with old roots in Tibet. A Japanese Buddhist Dr. Mikao Usui re-discovered the technique. He then developed Reiki to its modern form and application in the late 19th century.
Reiki is an ancient Japanese hands-on energy healing technique. Most of all it is a technique for relaxation and stress reduction that also promotes healing.
All through the history of mankind healing methods have always existed. These are methods which were based on the transfer of a universal, all-pervasive life energy. Especially relevant, the same energy which brings about all life in the universe, and nourishes it.