Weekly dive report showing Naruhodo the cave can be closed when waves are high.
Naruhodo The Cave: a beginner cave dive by boat.
Naruhodo The Cave: a beginner cave dive by boat.
Boat access and guide briefing are the practical default for this overhead site.
Boat-dived cave system on the Miyakojima and Shimojishima side, built around a short tunnel and a doughnut-like loop that brings you back toward the entrance. The site is more about structure and light than distance: bright shafts, darker pockets, and open chambers make it a photogenic overhead dive, while nearby reef sections add mixed small life. Plan it with a guide and pick calmer windows, because waves and timing shape how the cave feels.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 14m
Depth Note
Maximum depth reported around the mid-teens.
Best Season
Autumn and winter, especially October through March, with year-round diving possible.
Typical Conditions
Guided boat cave dive with a short tunnel, open chambers, and light shafts that shift with sun angle and season.
Site conditions, restrictions, and access requirements.
Site Conditions
Safety Notes
Overhead cave environment. Maintain good buoyancy, follow guide direction, and do not treat it like an open-water drift site.
Access Restrictions
Boat access only; calm-weather windows matter because high waves can shut the site down.
Legal Notes
Follow operator rules and site-specific overhead-dive limits.
Community notes to help plan your visit.
Scuba Diving
A beginner-friendly cave dive with a short tunnel, overhead structure, and strong light-beam effects when the sun angle lines up.
Freediving
Not a freedive target; the overhead layout and boat-dive setup make this a scuba site.
Snorkeling
Not a casual snorkel site; it works as a guided scuba cave dive, not a surface-only outing.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Weekly dive report showing Naruhodo the cave can be closed when waves are high.
Boat-diving trip write-up with a short tunnel and cave marine life.
Official tourism brochure listing Naruhodo-the Cave among Shimojishima dive sites.
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