Sunshine Aquarium in sunshine city, Ikebukuro, the first rooftop aquarium in Japan, has just reopened in August 4th after closing for one year for renovations.
The aquarium is small compared to normal aquariums but the premium location gives a great advantage over other aquariums. As with most of the popular places in Tokyo, there are large crowds on weekends, but late in the afternoon and weekdays is no so bad.
The renovated marine garden area, has a large elevated see-through pool, where the seals swim under the open sky. The Sea lions perform at the same area several times per day.