The Kerama Islands were designated Japan's thirty-first national park in 2014, not for their beaches but for their coral. The archipelago twenty-two miles west of Naha shelters two hundred fifty recorded species of hard and soft coral, seventy of which are endemic to the Kerama group. The water here earned its own name — Kerama Blue — a term divers use to describe visibility exceeding one hundred feet on calm days. That clarity owes to the Kuroshio Current, which sweeps north past the islands and filters particulate matter offshore. The result is a dive environment where sunlight penetrates to depths of ninety feet, illuminating reef walls, overhangs, and canyons that drop beyond recreational limits. Tokashiki, the largest island in the group, anchors the national park's western sector. The island's coastline yields more than twenty catalogued dive sites, ranging from shallow coral gardens at fifteen feet to advanced drift dives along vertical walls. Ufugan, a site off the western coast, is known for its resident population of green sea turtles, which forage among table corals and can be observed at close range without disruption. Tokashiku Beach, on the island's northern shore, serves as a launch point for snorkeling and introductory diving excursions, where instructors guide first-time divers through buoyancy drills in sand channels before moving onto the reef. Manta rays frequent the channels between Tokashiki and neighboring Zamami Island during spring and autumn migrations, and dive operators schedule advanced trips to intercept feeding aggregations. The island's dive infrastructure expanded following the national park designation. Operators based in Tokashiki Village offer daily boat departures to outer reef sites, and most accept walk-in bookings for certified divers. Introductory diving programs follow PADI Discover Scuba protocols, combining shallow-water orientation with guided reef exploration. Tokashiki Island diving trips typically include two dives with a surface interval, and rental equipment is standardized across operators. Ferry service from Naha's Tomari Port runs twice daily, with crossing times of thirty-five minutes on the high-speed vessel and seventy minutes on the car ferry. The environmental support tax, collected with ferry tickets, funds reef monitoring and mooring buoy maintenance across the national park. Most dive sites lie within a fifteen-minute boat ride from Tokashiki's harbor, concentrating activity along the island's western and northern coasts where bathymetry creates the most diverse topography.