The largest of the Ryukyu Islands is Okinawa, which has seven letters. Okinawa is an archipelago located in the East China Sea between Japan, Taiwan, and the Philippines. It is the largest and most populous island in the Ryukyu Islands, with a population of over 1.4 million people. Okinawa is known for its beautiful beaches, lush forests, and vibrant culture. It is also home to many US military bases, making it an important strategic location in the Pacific region.