Keya no Ooto
Aja No Daimon
Experience the awe-inspiring scale of Keya no Ooto, Japan's largest basalt sea cave.Explore this spot
Keya no Ooto is one of the largest basalt sea caves in Japan, located along the coast of Itoshima City, Fukuoka Prefecture.
What makes it special
About Keya no Ooto
- Inside the Cave Experience: Seeing the massive rock walls and geometric columns from the boat is a once-in-a-lifetime memory.
- Photographer's Paradise: The geometric patterns of the basalt columns provide a stunning and unique subject for photography.
- Beach & Cruise Combo: Combine your boat tour with a relaxing day at the crystal-clear Keya Beach for a full day of fun.
- Seasonal Planning: Since the boat operates from mid-March to late November, plan your trip within this window.
- Scenic Drive: Enjoy the beautiful coastal scenery of Itoshima while driving to this spectacular natural site.
Weather forecast
Tue
8/4
30°/29°
100%
Wed
8/5
31°/28°
86%
Thu
8/6
34°/28°
48%
Fri
8/7
35°/29°
57%
Sat
8/8
35°/28°
63%
Sun
8/9
32°/25°
62%
Mon
8/10
31°/26°
69%
Tips
Payment
Cash is highly recommended for boat-related expenses.
Language
English signage and support may be limited in the area.
Reservations
No advance reservation is required, but please check weather conditions as cruises may be canceled due to waves or wind.
Clothing
Wear comfortable clothing and be prepared for sea breezes.
Photography
Photography is permitted, but please prioritize safety and do not disturb the natural environment.
Accessibility
There may be steps or uneven surfaces near the shore and when boarding the boats.
Etiquette
Please follow the 'Leave No Trace' principle by taking all trash with you to protect the natural environment.