Aqua World, formerly the Ibaraki Prefectural Oarai Aquarium, is a 19,800 square metres aquarium in the Higashiibaraki District of Ibaraki Prefecture, Japan, north of Oarai port at the mouth of the Naka River.
Date opened: April 2002 (as Aqua World)
Location: Oarai, Ibaraki, Japan
Land area: 19,800 m² (213,000 sq ft)
No. of animals: 68,000
No. of species: 580
Total volume of tanks: 5,100,000 litres (1,347,000 US gal)