Reiki is the name given to a system of natural healing which evolved in Japan from the experience and dedication of Dr Mikao Usui.
There is no belief system attached to Reiki so anyone can recieve or learn to give a Reiki treatment, the only prerequesite is the desire to be healed.
It has no creed or doctrine. It is life force energy , which is older than all the religions.
Everyone is able to channel energy, some of us just need to be shown how.