The Okinawa Churaumi Aquarium (沖縄美ら海水族館, Okinawa Churaumi Suizokan), found inside the Ocean Expo Commemorative National Government Park in Okinawa, Japan. It welcomed its 20 millionth visitor on 30 March 2010 and is a member of the Japanese Association of Zoos and Aquariums
In 1975, the World's Exposition or World's Fair was held in Okinawa, Japan at the Ocean Expo Park. Shortly afterward, the park began to lose tourism and it was believed that a new aquarium would help revive the place and celebrate Okinawa's Marine tradition. The aquarium was designed by Yukifusa Kokuba and was opened on 1 November 2002.