Things to Do in Okinawa in 2026 – Tours & Activities | VELTRA Discover Japan’s stunning underwater world with an exciting scuba diving tour. Whether you're a beginner or a certified diver, explore vibrant coral reefs, encounter marine life, and dive into crystal-clear waters. From Okinawa’s famous Blue Cave to Ishigaki’s manta rays and the pristine Kerama Islands, these tours offer unforgettable experiences. Choose from beach or boat entry dives, private guided sessions, or eco-friendly adventures for a thrilling journey beneath the waves.