This ancient Japanese blood circulation/cleansing technique was a favourite technique of the founder of Reiki, Dr Usui, but traditionally only taught as part of the advanced Reiki programme.
Today 'keko' is only selectively taught by certain Reiki schools and is therefore not readily available despite its powerful benefits.
Besides being deeply relaxing and destressing it was designed to improve blood circulation and therefore has benefits in the treatment of a mutlitude of ailments too long to mention here [details are available on request].