Generally called Mt. Haguro, Mt. Gassan, and Mt. Yudonosan are the heart of Japanese mountain worship. It is said that over 1400 years ago a close relative of the Japanese Emperor created this belief system. They are commonly climbed in the order of Haguro, Gassan and Yudono each representing their own meaning that is life, death and the future. Since 500 years ago, many people have been making a pilgrimage to this area. This led to many inns being established around the highest peak Mt. Gassan, which are still present to this day.