RISTA is a diagnostic device created by Dr Nakatani who called it Ryodoraku. It combines Eastern Traditional Meridian Diagnostic with Western Electro-Bio feedback and computer assisted analysis.

RISTA provides  an effective way to evaluate the condition of vital body functions  and identify specific imbalances for treatment, using Nakatani’s method of deriving a reliable energetic functional profile of organs and related systems.

Utilizing years of experience and statistical data, RISTA projects optimal treatments using energy points on meridians and zones on the body, which can then be treated with the Scenar device and Shiatsu to address a specific problem or dysfunction.

RISTA measures electric deficiency or excess of each meridian, and projects the profile graphically on a chart.