Mountains are frequently the stage for "theophanies"—moments where the divine reveals itself to man. There is a psychological component to this: the solitude, the physical exertion, and the overwhelming scale of the landscape prime the human mind for awe.
For many cultures, mountains are not just symbols of God; they are the literal homes of deities or the deities themselves. Holy Mountains
In Shintoism, Fuji is personified as the goddess Konohanasakuya-hime. The mountain is a site of pilgrimage where the act of climbing is a form of ascetic practice, intended to harmonize the individual with the spirit of the land. the physical exertion