High Quality Content by WIKIPEDIA articles Okinawa Island (沖縄本島 Okinawa-hontō, or 沖縄島 Okinawa-jima) is the largest of the Okinawa Islands and the Ryukyu Islands of Japan, and is home to Naha, the capital of Okinawa Prefecture. The island has an area of 1,201.03 square kilometers (463.72 sq mi). It is roughly 400 miles (640 km) south of the rest of Japan.