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Diver journal mentioning Kumomi Ushitsukiiwa and common octopus sightings.
Dive Spot Guide•
Kumomi Ushitsukiiwa
Kumomi Ushitsukiiwa: boat cave dive with rich life.
Plan a guided boat dive to the Ushitsukiiwa rocks in front of Kumomi harbor; expect caves, caverns, soft corals, and seasonally clear water.
About Kumomi Ushitsukiiwa
Kumomi Ushitsukiiwa is a boat dive in front of Kumomi harbor on the Izu Peninsula, built around two large rocks with caves and caverns between them. It combines soft corals, sea goldies, butterflyfish, and offshore schools of grunts with a route that suits guided boat dives and disciplined overhead-environment planning.
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Research Estimate At Kumomi Ushitsukiiwa
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 20m
AccessSimple entry
CoralMixed health
Aquatic LifeGreat variety
FacilitiesGood facilities
Crowd / PopularityQuite busy
CurrentLight current
SurgeLight surge
Where Is Kumomi Ushitsukiiwa?
Community sourced coordinates.
Featured Operators
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Kumomi Ushitsukiiwa Planning Details
Depth range, seasonality, and planning context.
Reported Depth
12m - 24m
Depth Note
Boat-dive routes average about 12-15 m, with advanced lines reaching around 24 m.
Best Season
Summer and autumn for the clearest visibility; year-round diving is possible.
Safety & Access At Kumomi Ushitsukiiwa
Site conditions, restrictions, and access requirements.
Site Conditions
Overhead environment
Safety Notes
Treat it as a cave/cavern dive with overhead sections; keep your gas, buddy contact, and exit plan disciplined.
Access Restrictions
Boat access only; overhead sections require cave/cavern discipline and the right certification.
Legal Notes
Follow local boat-operator and harbor rules for the cave-diving area.
Local Intel For Kumomi Ushitsukiiwa
Community notes to help plan your visit.
Scuba Diving
A boat-access cave and cavern system with routes that range from novice to advanced profiles.
Freediving
Not a freedive target; the overhead sections and boat logistics make scuba the correct mode.
Snorkeling
Not a snorkel site; the best features are underwater caves, caverns, and the surrounding reef structure.
Wildlife at Kumomi Ushitsukiiwa
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Kumomi Ushitsukiiwa
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Kumomi Ushitsukiiwa
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility20m
Activity
No dive activity logged yet.
