The derivation of the word Asama is subject to considerable uncertainty and debate, but the original meaning of the word appears to be connected with volcanoes or volcanic eruptions, and the presence of water springs in the foothills of such mountains. Mountain-worship based cults centered on in Niigata and in Mie appear contemporary with the mountain-cult centered on Mount Fuji, via references in the Man'yōshū. However, worship of Mount Fuji, as the tallest and most famous volcano in Japan came to dominate. Mount Fuji has erupted eighteen times in recorded history. In order to pacify it, the Imperial Court awarded it court rank and venerated it as Sengen Ōkami in the early Heian period