A city-in-a-city mall complex in Ikebukuro — rooftop aquarium (only one of its kind in Japan), Pokemon Center Mega Tokyo, planetarium, observatory, J-World, Namja Town indoor theme park. Dense enough to fill a full day indoors when weather is bad.
Typeshopping mall, family friendly, all weather
💡Local tip
Rainy-day default — aquarium + Pokemon Center + planetarium in one trip.