The Kaiyukan in Osaka is the largest aquarium in Japan and at the same time one of the largest in the world. It is located in the Minato district near the port area of Osaka. Opened in 1990, it is one of the largest indoor aquariums with a total water volume of more than 11,000 tons is home to around 620 animal and plant species. The main theme of the aquarium is the "Ring of Life" or the "Ring of Fire" and is represented by the arrangement of the more than 15 different pools. Each of the pools represents a specific region on the Pacific Ring of Fire and visitors can experience themed worlds on a tour from the Japanese forests to the Antarctic to the heart of the aquarium, the Pacific Ocean. In the latter, for example, there is a whale shark, the largest fish on earth. In addition to these permanent exhibitions, the Kaiyukan also offers some interactive highlights, where you can get close to different animal species and sometimes stroke and even feed them. The aquarium has a souvenir shop and is located directly at Tempozan Harbor Village, a shopping and entertainment complex with many restaurants and shops.