Yudonosan-daigongenThe Unspeakable Deity of the Sacred Rock of Mount Yudono

Yudonosan-daigongen does not have a tangible statue form; instead, a giant, brownish-red sacred rock spewing hot water serves directly as the object of worship, preserving the oldest form of nature worship in Japanese mountain faith. The Dewa Sanzan are considered a trinity of ascetic training grounds: Mount Haguro symbolizes worldly happiness in the present, Mount Gassan represents the afterlife, and Mount Yudono signifies the future of rebirth. Therefore, Mount Yudono, as the inner sanctuary, is positioned as the final destination of the three-mountain pilgrimage. The object of worship has neither a shrine building nor a roof. Pilgrims must take off their footwear and walk barefoot on the approach mixed with earth and stones to climb the sacred rock. The strict taboo against disclosing one's experiences on the mountain—"Do not speak of it, do not ask of it"—is still observed today, and photography is strictly prohibited. Although it lost the title of "gongen" during the Meiji era's anti-Buddhist movement and became a shrine dedicated to deities like Ōyamatsumi-no-Mikoto, the faith itself—pressing one's hands together in prayer to the silent sacred rock—has never been broken. It is the silent divine entity of Dewa that presides over rebirth and *sokushin-jōbutsu*.