The penguins in Ikebukuro swim overhead.
Sunshine Aquarium’s Outdoor Marine Garden is called Sky Journey, and its best-known section is “Penguins in the Sky.” The official page says the birds swimming in the cantilevered tank, about 12 meters wide, are African penguins. They glide in front of city buildings and look as if they are flying through the Tokyo sky.
That scene is easy to share, and just as easy to misunderstand. These are not Antarctic penguins. They are a temperate species from the coast of southern Africa.

What to see
The sky penguins have two viewing angles. From the front, the birds swim across the city skyline; from underneath the tank, they sweep over your head, with bellies and feet clearly visible.
Penguins in the Grassland, next to it, recreates the feeling of grassy slopes and sandy shore near Cape Town in South Africa, with nest spaces and a quieter viewing distance. It is a useful reminder that African penguins do not only swim. They also need land, burrows, and partner interaction.
If you are planning a Tokyo penguin route, pair this page with Sumida Aquarium and Ueno Zoo Penguins. Sumida is at Tokyo Skytree, Sunshine is on an Ikebukuro rooftop, and Ueno places African penguins inside an old city zoo.
For a wild-habitat contrast, Boulders Beach African penguins gives the same species a much more direct South African setting.

How to plan it
Sunshine Aquarium works well as an Ikebukuro half-day stop. Access is easy, and the visit can be short or stretched out, but the crowd concentrates around sky penguin feeding times.
The official event pages list “Penguin feeding time in the sky” and “Penguin feeding time on the grassland.” These programs may be canceled when avian influenza conditions nearby change, so the daily schedule is more reliable than memory.
If you are coming to Tokyo from overseas and only want one urban aquarium, Sunshine leaves the stronger visual memory. If you want a quieter look at a colony, Sumida may suit you better.

Penchan Says
Sunshine knows how to catch the eye.
But the more the scene feels like an urban spectacle, the more it helps to remember that the bird is actually from the African coast. The sky is the display method, not its home.
References
FAQ
What species are the Sunshine Aquarium sky penguins?
The official Sky Journey page says the birds in Penguins in the Sky are African penguins, not Antarctic penguins.
Why are Sunshine Aquarium's sky penguins easy to misunderstand?
They swim in front of Tokyo towers and look as if they are flying through the sky, but African penguins are a temperate species from the southern African coast.
How should I plan a Sunshine Aquarium penguin visit?
It fits an Ikebukuro half-day well. Feeding times draw crowds, and programs can change with avian influenza conditions, so check the daily schedule before going.