Kaiyūkan is easily one of the world's best aquariums. An 800m-plus walkway winds past displays of sea life from around the Pacific 'ring of fire': Antarctic penguins, coral-reef butterflyfish, unreasonably cute Arctic otters, Monterey Bay seals and unearthly jellyfish. Most impressive is the ginormous central tank, housing a whale shark, manta and thousands of other fish and rays. There are good English descriptions, but the audioguide (¥500) gives more detail. Expect lots of families and school groups.
