The "Three Mountains of Dewa" are a sacred mountain range located in Yamagata Prefecture, Japan. The three peaks are Mount Haguro, Mount Gassan, and Mount Yudono. These mountains are significant in the Shinto and Buddhist traditions, attracting pilgrims and hikers alike. Each mountain offers unique spiritual experiences and natural beauty. Mount Haguro is known for its ancient temples and a five-story pagoda, while Mount Gassan is the highest peak, offering stunning views. Mount Yudono is considered a place of purification, where visitors can engage in rituals to cleanse the spirit.