Reiki (霊気 or レイキ, Reiki IPA: /ˈreɪkiː/) is a spiritual practice used as a complementary therapy developed in 1922 by Mikao Usui. After three weeks of fasting and meditating on Mount Kurama, in Japan, Usui claimed to receive the ability of 'healing without energy depletion'. Practitioners use a technique similar to the laying on of hands, which they say will channel "healing energy" (a form of ki) through their palms. Neither the existence of ki nor any mechanism for its manipulation are scientifically accepted, and the evidence base does not support the efficacy of reiki or its recommendation for use in treatment.