Ninigi is believed to have descended from Takamanohara (the vast realm in heaven where deities resided) at the order of the Goddess Amaterasu, his grandmother, to rule Ashihara no nakatsukuni (literally, "the central land of reed plains," which was the human world).
天照大神の命により、葦原中国を統治するため高天原から地上に降りたとされる。