The Gusuku Sites and Related Properties of the Kingdom of Ryukyu represent a unique cultural heritage on the Okinawa Prefecture islands in Japan. These sites, which include castles, fortresses, and sacred groves, are a testament to the Ryukyu Kingdom's rich history and its blend of Japanese and Chinese influences. Inscribed as a UNESCO World Heritage Site, they offer a glimpse into the architectural and cultural exchanges that shaped the region from the 12th to the 16th century.