Zen Shiatsu is characterized by the theory of Kyo-Jitsu, its physical and psychological manifestations, and its application to abdominal (Hara) diagnosis. Zen Shiatsu theory is based on an extended meridian system that includes, as well as expands, the location of the traditional acupuncture meridians. The focus of a Zen Shiatsu session is on the use of meridian lines rather than on specific points. In addition, Zen Shiatsu does not adhere to a fixed sequence or set of methods that are applied to all similar client needs. It utilizes appropriate methods for the unique pattern of each individual. Zen Shiatsu was developed by Shizuto Masunaga.