Three Mountains of Dewa
The Dewa Sanzan are considered very holy in both Shinto and Buddhism religions, but especially important to the Shugendo religious beliefs. Each of the three sacred mountains, Mount Haguro, Mount Gassan, and Mount Yudono, has its own shrine, but the main Dewa Shrine is situated at the top of Mount Haguro. What makes the primary shrine unique is that it honors all three of the sacred mountains.