
Ao no Dokutsu (Blue Cave)
Ao no Dokutsu
Located on the Otaru coastline, the Blue Cave is a breathtaking spot where towering rock walls meet crystal-clear waters.Explore this spot

Located along the scenic coastline of Otaru, the Blue Cave (Ao no Dokutsu) is a renowned natural landmark within the Niseko Shakotan-Otaru Quasi-National Park.
What makes it special
About Ao no Dokutsu (Blue Cave)
- Witness Natural Grandeur Up Close: Although entry into the cave is restricted, the cruise brings you close enough to witness the stunning contrast between the towering cliffs and the sea.
- Seasonal Scenic Beauty: The summer months from May to September offer the most beautiful sea colors and light, making it the optimal time for a cruise.
- Safe Sightseeing: Because routes are specifically designed to avoid rockfall zones, you can enjoy the magnificent scenery with peace of mind.
Weather forecast
Mon
8/3
25°/15°
0%
Tue
8/4
26°/16°
0%
Wed
8/5
26°/16°
0%
Thu
8/6
26°/17°
0%
Fri
8/7
27°/18°
25%
Sat
8/8
23°/19°
41%
Sun
8/9
22°/18°
22%
Tips
Payment
Cash, various credit cards, and PayPay are accepted at many operators.
English Support
Please check the official website of your specific cruise operator for English-language availability and guidance.
Reservations
Advance booking is highly recommended for certain tours.
Clothing
Wear comfortable clothing suitable for sea breezes and changing weather.
Photography
Photography is permitted, but please prioritize safety and follow crew instructions.
Accessibility
Depending on the vessel and boarding location, there may be steps or uneven surfaces; please check in advance.
Safety Restrictions
For safety reasons, pregnant women, children under 3 years old, and individuals with difficulty walking may not be able to board.