Japan · Irabu/Shimoji, Miyako Islands
W Arch
Best time to dive
January to December
What you might see
- Hammerhead sharkLikely
- Sea turtleLikely
Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.
Certification & difficulty
Advanced Open Water - advanced conditions (currents/depth); dive within your training.
Snorkelling
Not a snorkel site - No - overhead cave/cavern
Safety notes
Season-dependent; standard dive precautions; overhead environment - light and guide
Permits & fees
Boat dive from Miyakojima (Miyako/Irabu/Shimoji)
Permits and operators change - confirm before booking.
Location
Nearest hub: Miyakojima
This profile is desk research, compiled from public sources - not a first-hand dive report. Coordinates are approximate.