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Rausu

Type:
Scuba Diving
Entry:Unknown
Difficulty:Expert
Tags:
Great ScubaKelp Forest
About This Dive Spot

Rausu, on Japan’s Shiretoko Peninsula, is known for seasonal ice diving where divers can enter the water alongside drifting sea ice. The drift ice forms from freshwater that freezes and is carried in by winds, typically arriving each year from January to March. Divers may encounter unique cold-water life including kurione (shellless sea butterflies) and their prey, along with abundant invertebrates such as crabs, shrimps, nudibranchs, and anemones. Fish sightings can include sea lamprey, and the area features notable Rausu kelp underwater.

Planning details
Reported depth and seasonality.

Best season

January to March

Typical conditions

Drift ice is present seasonally and water temperatures are below freezing.

Safety & access
Hazards, restrictions, and required precautions.

Hazards

Cold water

Safety notes

This is a sub-freezing ice-diving environment and requires appropriate exposure protection and cold-water/ice-diving procedures.

Where is this?
Map location of Rausu
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Local intel
Community notes to help plan your visit.

Tailored notes for different activities.

Scuba

Ice diving is possible on seasonal drift ice, a rare experience compared with typical frozen-lake ice dives.

Dive Spot Log Averages
Average conditions based on logged dives & visits
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Dive Conditions Planner
Current snapshot, today hourly conditions, and seven-day planning data.

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Frequently Asked Questions

What's the best entry point at Rausu?
Entry at Rausu is detailed in the spot description above. Look for specific landmarks, access paths, and any tide or condition requirements. Local divers often share updated entry tips in their dive logs.
What conditions are best for diving Rausu?
Optimal conditions at Rausu depend on several factors including tide, wind, and season. Check recent dive logs for current condition reports and patterns. Generally, calmer seas and high tide provide better visibility and easier entry.
What is the maximum depth and typical visibility at Rausu?
Depth and visibility information for Rausu can be found in the spot details and recent dive logs. Conditions can vary significantly based on weather, tide, and season. Always plan your dive according to current conditions and your certification level.
Are there any safety considerations or local etiquette at Rausu?
When diving Rausu, respect local regulations, marine life, and other water users. Be aware of any specific hazards like currents or boat traffic mentioned in the spot description. Follow Leave No Trace principles and local diving etiquette.