Ryodoraku therapy is an electro-stimulatory diagnostic and therapeutic technique based on many observations of electric current recordings made over acupuncture points.

It offers a means of objectively recording a traditional Zang-Fu diagnosis in terms of energy excess of deficiency in the meridians.

Ryodoraku is simple to learn but requires persistence in order to be able to carry it out properly. It can be learnt without any prior knowledge or understanding of Traditional Chinese Medicine. It offers a fascinating and practical insight into meridian phenomena as well as proving effective in clinical practice.

In 1951 Dr. Yoshio Nakatani presented his research theory of RYODORAKU acupuncture.

Dr. Nakatani found out that a series of low electrical resistance points (or high electrical conductivity) running longitudinally up and down the body. When being linked together these points closely matched the acupuncture meridians. Dr. Nakatani called these lines (or meridians) “Ryodoraku” (ryo = good, 'do is (electro) conductive, 'raku = line). He called the points along the Ryodoraku as Ryodoten, meaning hyper-electroconductive points. Dr. Nakatani organized Ryodoten points fairly similar in their route to the meridian pathways. He also created a measurement point, called Ryodoraku Representative Measurement Point on each Ryodoraku. These points are nearly all located in the same place as the meridian Source Point. Nakatani developed 24 of the above-mentioned measurement points that are 12 on each side of the body, based on the traditional idea of there being 12 meridians on each side of the body.

Nakatani worked out a new numbering system of meridians so that those practitioners who had no knowledge of Traditional Chinese Medicine. Nakatani named Ryodoraku meridians and assigned a number and a letter symbol "H" or "F" to each line / "H" - hand, "F"-foot/ to each meridian.

The measurement values of the Ryodoraku Representative Measurement Points on each Ryodoraku meridian reflect the average of the measurement values of all the Ryodo points located in the same areas as the meridian points. This means that the measurements from the representative points can describe the level of all the Ryodoraku meridians.

The values of representative points are plotted on the Ryodoraku Chart which is designed for indicating whether Qi levels of each Ryodoraku meridian are balanced or not.