Karuna Ki Reiki is a system that uses the Energy of Compassion (in Sanskrit Karuna translates by compassion) through various techniques, meditation and symbols. The system has common roots with Sai Baba Reiki, Tera May Reiki, Karuna Reiki, uses the same symbols, but in a different form. Unlike Karuna, Reiki is not a registered trademark, it remained an open system, and consequently Independent Instructors Masters may issue Certificates that attest completion of courses.

It is aimed identifying with compassion, the vibration of this psychologically condition being beneficial to the health of everyone, as to achieve the best ways of goals. It is the reason why the system provides a special connection with the goddess Qwan Yin, the goddess of mercy, of compassion. One can say that at the basis of all Karuna systems was Kathleen Ann Milner.

Kathleen Ann Milner: initiated in Reiki I and II since 1983, became Usui Reiki Master in 1989. During a meditation, a spiritual superior being, initially considered to be Sai Baba, has attuned her and Marcy Miller in Zonar symbol. Subsequently, in May 1991, the same superior being send her the Harth symbol and how to make attunements, as the suggestion to appoint Reiki Tera May the new system. According to Kathleen's guide, Reiki is called only one of the healing rays, that of Earth, and presented the other rays, of Water (Sophia-El), of Fire (Sakar) and of Air (Angeliclight).

Vincent P. Amador developed techniques of using Karuna energy and Karuna symbols, and techniques of meditation, which he grouped in the system Karuna Ki, the system or (http://www.light-reiki.co.uk ) is a "path of compassion", not " the action of compassion", as Karuna Reiki is defined, William Lee Rand's system (http://www.reiki.org).
Master Amador focuses on the system, and in teaching and use of Usui Reiki, on simplicity and intuition.