

Best for beginner divers, 5-15m, boat entry, mild current.
Rainbow Arch is a reef and cave site located 500 metres offshore in the Izu Peninsula and Hachijojima region of Japan. The site features a reef structure and cave system ranging from 5 to 15 metres in depth, with an average of 10 metres. It is accessible only by boat. Visibility typically ranges between 8 and 18 metres, and currents are generally mild. The site is suitable for beginners, though divers should maintain good buoyancy control to avoid contact with the soft corals found on the reef and cave walls. Water temperatures fluctuate throughout the year, ranging from 17C in March to 27C in September.
34.28660, 136.65700
The site is boat access only, so confirm departure times and operator details before you travel, as no facilities are guaranteed at the site itself. Mild current means buoyancy control is the main skill to practise, especially inside the cave section where staying off the bottom protects the soft corals.
Access info coming soon
No known hazards
Expected in this region. No sightings logged here yet.
Depth
5-15m
Visibility
8-18m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
17-27°C
Current
Mild
The site supports a variety of reef fish and invertebrates typical of the region, including various nudibranchs, cephalopods, and crustaceans.
Yes, Rainbow Arch is well suited to beginners, provided they have the buoyancy control skills necessary to navigate the cave section without damaging the reef.
The site depth ranges from 5 to 15 metres, with an average depth of 10 metres.
This is a boat-only dive site located 500 metres from the shore.
While the site is primarily a dive location, the shallow reef sections may be accessible to snorkelers depending on boat operator policies.
A 5mm wetsuit is recommended for diving at Rainbow Arch in Minamiise. Water temperatures range from 17°C to 27°C.
Rainbow Arch in Minamiise typically has mild currents that most divers can handle comfortably.
Visibility at Rainbow Arch in Minamiise typically ranges from 8 metres to 18 metres. Conditions vary with weather, tides, and seasons.