As one of the largest aquariums in the world, Osaka Aquarium Kaiyukan is certain to amaze. Complete with an impressive display of marine life from the waters of Japan, the Pacific Ocean and beyond, this walk-through aquarium aims to bring visitors closer to the underwater world. Exhibiting 15+ tanks (the largest being 9 meters deep!), you'll see not only fish, manta rays and whale sharks, but also amphibians, reptiles, birds and mammals representing the beautiful and diverse natural environment of the Pacific Rim region.