Origin is from India culture. Ragaraja, the Buddhist of the lord of passion, helps transform sexual energy into enlightenment. His incarnation as Aizen Myo known in India. In other words, Aizen Myo might be Ragaraja and Ragaraja is not necessarily Aizen Myo.
Judika Illes, Encyclopaedia of Spirits the ultimate guide to the magic of fairies, genies, demons, ghosts, gods and goddesses, 2009, Ragaraja, p 860