Shiatsu (指圧 Japanese from shi, meaning finger, and atsu, meaning pressure) is a traditional Japanese hands-on therapy based on anatomical and physiological theory and is regulated as a licensed medical therapy with the Ministry of Health and Welfare in Japan. Shiatsu is an evolving form. Various styles (called Derivative Shiatsu) incorporate (to differing degrees) aspects of Japanese massage traditions, Chinese Medicine practice, and "Western" anatomy and physiology.
Definition of Shiatsu
"Shiatsu technique refers to the use of fingers and palm of one's hand to apply pressure to particular sections on the surface of the body for the purpose of correcting the imbalances of the body, and for maintaining and promoting health. It is also a method contributing to the healing of specific illnesses."
—Japanese medical department of the Ministry of Welfare (current Ministry of Health, Labor and Welfare) in December 1957.
(Excerpted from http://en.wikipedia.org/wiki/Shiatsu )