Located in Fujikawaguchiko Town, Yamanashi Prefecture, the Fugaku Wind Cave is a lava cave formed by an eruption of Mount Fuji over 1,000 years ago. Designated a Natural Monument of Japan in 1935, it offers a fascinating glimpse into the volcanic power that shaped the region.
Highlights
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Naturally Cool All Year Round
With an average temperature of around 3°C (37°F), the cave remains refreshingly cool even in summer. It once served as a natural refrigerator for storing silkworm eggs and seeds during the pre-modern era. -
Beautiful Ice Formations
In colder months, stunning ice pillars form inside the cave. Some remain visible even into spring or summer, creating a surreal, otherworldly atmosphere. -
Unique Lava Formations
Inside the cave, visitors can observe geological features like lava shelves and rope-like lava flows—formed by cooling molten rock—providing a natural science lesson beneath the earth.
Visitor Information
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Location: 2068-1 Saiko Aokigahara, Fujikawaguchiko, Yamanashi Prefecture
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Access: About 30 minutes by bus from Kawaguchiko Station (Saiko Sightseeing Bus)
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Opening Hours: Vary by season, generally 9:00 AM to 5:00 PM
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Admission: Adults ¥350 / Children ¥200 (as of 2025)
Nearby Attractions
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Narusawa Ice Cave: Another fascinating lava cave just a short walk or drive away.
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Aokigahara Forest: Known as the "Sea of Trees," this mysterious forest is ideal for short hikes and nature walks.
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Lake Saiko: A peaceful lake nearby, great for relaxing, picnicking, or boating.
Why Visit?
Fugaku Wind Cave offers a rare opportunity to explore a natural lava tube up close, while escaping the summer heat. It’s a must-see for nature lovers, geology enthusiasts, families, and anyone curious about Japan’s volcanic heritage.
Whether you're seeking relief from the summer heat, fascinated by volcanic geology, or simply looking to explore one of Mount Fuji’s hidden natural wonders, Fugaku Wind Cave offers a cool and unforgettable adventure beneath the surface of Japan’s iconic mountain.
Official Website
https://www.mtfuji-cave.com/en/wind_cave/
Accommodation sites
Agoda
