The Narusawa Ice Cave is located at the entrance to the Aokigahara Jukai (or Sea of Trees) forest. After being designated by the Ministry of Education as a natural monument in the 1920s, it is now considered a geological wonder, attracting tourists exploring the Five Lakes area at the base of Mount Fuji.
More than 1,100 years ago, a volcano on Mount Fuji erupted and the lava flowed down between ancient volcanoes creating this two-tunnel cave. The cave experiences temperatures of three degrees celsius and is covered with ice all year-round, even at the height of summer.
During April, the cave’s icicles have been known to grow up to three meters long and almost half a meter wide. The cave itself is 150 meters in length, although the route down is short, and it will take visitors just a few steps to experience this natural phenomenon’s cooler climate.
The Narusawa Ice Cave is approximately 25 minutes by bus from Kawaguchiko Station (Fuji Kyuko line). Helmets are provided at the cave, but sensible shoes with a good grip are recommended as the path and steps are usually wet.