Clearest sea and coral reef around a tropical island, Okinawa, Japan
Tokashiku Beach, Tokashiki Island, Okinawa, Japan
Tokashiki Island belongs to the Kerama Island group which is known for some of the world's clearest waters with 50-60m visibility.
The Kerama Islands are also known as one of the world's best diving destinations, having a number of coral species and marine lives as large as those in the Great Barrier Reef. Over 400 types of corals, 5 types of sea turtles, manta rays, whale sharks and all kinds of tropical fish species all live around the islands of Okinawa.