Top 10 Caves in Japan
Japan's volcanic and karst geology delivers two strong cave traditions: the lava tubes of Mount Fuji and the western limestone caves around Akiyoshi-do. Cultural significance is high — many caves contain Buddhist shrines.
1. Akiyoshi-do, Yamaguchi
Karst cave. Japan's largest and longest show cave — 1 km of the 11.2-km system on the tour route. The Hundred Plates of rimstone pools are the signature feature. Tour grade A.
2. Narusawa Ice Cave, Mount Fuji
Lava tube. A short, ice-filled tube formed in the 864 AD Aokigahara eruption. Helmets provided. Tour grade A.
3. Fugaku Wind Cave, Mount Fuji
Lava tube. Adjacent to Narusawa — cold cave traditionally used for storing silkworm eggs. Tour grade A.
4. Ryusen-do, Iwate
Karst cave. Famous for its underground lakes of exceptional clarity — the third lake reaches 98 m in depth. Tour grade A.
5. Abukuma-do, Fukushima
Karst cave. Spectacular column formations including the giant "Christmas Tree" stalagmite. Tour grade A.
6. Inazumi Underwater Cave, Oita
Karst cave. Active cave-diving destination as well as a show cave above water — Japan's most accessible underwater cave. Tour grade B.
7. Bansho-kutsu, Iwate
Karst cave. Connected to Ryusen-do, with archaeological remains and underground river. Tour grade B.
8. Imabari Sea Caves, Shikoku
Sea cave network around the Setouchi Islands — boat tours operate seasonally. Tour grade A.
9. Tokugawa Cave, Kanto
Karst cave. Small but historically used as a wartime shelter and shrine; short tourist tour. Tour grade A.
10. Onyu-do, Niigata
Karst cave. Smallish show cave with Buddhist shrine inside the entrance chamber. Tour grade A.
Planning a Japan cave trip
Akiyoshi-do anchors a Yamaguchi day. The Mount Fuji lava tubes are an easy add-on from Kawaguchiko. Ryusen-do is the highlight of any Tohoku itinerary.
Keep exploring
See every Japanese cave on the interactive map.