Ryūgū Dōketsu, Lava and ice cave at Mount Fuji, Japan.
The Ryūgū Dōketsu cave extends 96 meters into Mount Fuji's northern slope, maintaining temperatures between -2 and +3 degrees Celsius throughout the year.
The cave received protection status as a natural monument in 1929, recognizing its geological importance and traditional connections to regional farming communities.
The main chamber contains the Senoumi Shrine, dedicated to goddess Toyotama-hime no Mikoto, where annual pilgrimages occur each August 2nd.
Located near Lake Saiko, visitors can reach the cave by following Narusawo Road 139 westward for 4 kilometers, then turning right toward Saiko.
The cave's permanent ice formations create specific conditions for rare spider species that adapt to survive in perpetual freezing temperatures.
GPS coordinates: 35.48458,138.66827
Latest update: March 7, 2025 23:06
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