Kanjo was originally a ritual carried out for the enthronement of a king or official investiture of the Crown Prince in Ancient India in which water called kanjosui was poured onto the head of the king being enthroned.
灌頂は元来、古代インドの国王即位や立太子の際行われた、灌頂水と呼ばれる水が即位する王の頭上に注がれた儀式であった。