Dewa Sanzan is Haguroyama, Tsukiyama, a generic name of Mount Yudono
It was a mountain of the mountaineering asceticism to enshrine honorific title of a Japanese god of the mixture of Buddhism and Shintoism until the Meiji era.
Become Kamiyama after the Meiji era; Haguroyama Inakura spirit life, Tsukiyama god of night,
Mount Yudono is dedicated to major mountain god life, major king life, Mikami of shohikomeimei,
Since a founder, the Haguro group old mountaineering asceticism is succeeded to,
The faith to approach to Dewa Sanzan does not still change.