Snorkel from shore

Next June we are headed to Japan and will take a week or 10 days to do some snorkeling in Okinawa archipelago. Our son will be 10. I am looking for suggestions for good spots to snorkel from shore primarily. I don’t care about nearby amenities, and don’t care too much about crowds. Trying to pin down our itinerary so at the moment consider any island as an option. Thanks for advice!

by RowdyTitmouseStudio