The Okinawa Churaumi Aquarium is designed with the building entrance on the 3F entrance (Coral Lobby) and the Aquarium itself beginning on the 4F, so that visitors descend to the 1F and 2F in order to see the Deep Sea exhibits.
Each floor has theme that represent Okinawan Seas. You can experience wondrous and precious of Okinawan Seas while walking.
Feel free to download a PDF file of the aquarium floor map for your use. This covers aquarium routes and areas in detail, and is a useful resource during your visit to Okinawa Churaumi Aquarium.