Walk the shadowed floor of Aokigahara and step into a lava tube that preserves ice year-round. This guided, small-group tour blends geology, mossy forest walks, and safe cave exploration near Mt. Fuji.
More ways to explore the area's outdoor wonders
A cool hush greets you as the forest swallows the noise of the road — trunks stand like slow-moving columns and a carpet of moss softens each step. The trail here angles across a plateau of black lava, trees contorting into odd, wind-carved shapes, while the ground seems to hold its breath. Ahead, a dark mouth in the rock promises year‑round ice that has served locals as a natural refrigerator since the Meiji era.
Difficulty
moderate
Duration
3 hours
Fitness Level
Suitable for most fitness levels — participants should be able to walk on uneven, rocky ground for up to an hour at a time and manage low-light cave passages.
Wildlife
History
The lava tubes and surrounding forest formed from Mt. Fuji’s eruptions; the ice caves were used historically as natural refrigerators in the Meiji era and the area is now protected as part of the Mt. Fuji World Heritage Site.
Conservation
Aokigahara’s moss and lichen communities are extremely slow-growing and vulnerable; stay on marked trails, avoid picking plants, and follow guide instructions to minimize impact.
Reserve your spot on the Exploring Mt Fuji Ice Cave and Sea of Trees Forest today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Wear grippy, closed-toe shoes
Lava fields are uneven and cave floors can be icy — sturdy hiking shoes with good tread reduce slips.
Layer for cold, even in summer
Cave interiors sit near freezing year-round; add an insulating mid-layer you can remove in the forest.
Follow the guide and stay on trails
Moss, lichens, and rare plants are fragile — stepping off paths damages these slow-growing communities.
Bring a lightweight daypack
Carry water, a camera, and snacks; helmets and gloves are provided but extra socks and a small towel are useful for damp conditions.
Sturdy hiking shoes
Provides traction on jagged lava rock and icy cave floors.
Insulating mid-layer (fleece or down)
Keeps you warm inside the cold cave even on warm days outside.
winter
Headlamp or compact flashlight
Useful for extra light inside lava tubes, though guides often provide lighting.
Small daypack with water and snacks
Keeps essentials handy during the three-hour outing and helps manage layers.
summer