The aquarium uses a completely artificial seawater manufacturing system, which is rare for large-scale indoor facilities.
The penguin pool is one of the largest indoor open-pool style tanks in Japan, allowing for close-up viewing of penguin behavior.
The jellyfish exhibit features a 'cradle' area where researchers actively breed and monitor jellyfish from their polyps stage.
The Ogasawara tank showcases the specific marine biodiversity found in the remote Ogasawara island chain.
The design layout deliberately omits a prescribed route to encourage spontaneous exploration and lingering at tanks.
The facility houses a 'Laboratory' zone where staff members conduct research in public view and answer visitor questions.
Sumida Aquarium is a modern, indoor urban aquarium located within the Tokyo Solamachi complex at the base of Tokyo Skytree. It features an open, indoor pool-style tank that allows visitors to view penguins and fur seals from multiple angles without glass barriers between levels. The facility utilizes a sophisticated artificial seawater production system, which facilitates high water quality and supports diverse marine life. A key display is the massive 350,000-liter tank recreating the Ogasawara Islands' ecosystem, a UNESCO World Natural Heritage site. The aquarium focuses on the concept of 'Inochi no Minamo' (water surface of life), emphasizing a close connection between humans and marine animals. It lacks a fixed path, allowing guests to wander freely across its two floors. The site also hosts a dedicated jellyfish laboratory where visitors can observe the lifecycle of various jellyfish species. Educational programs and feeding sessions are held regularly throughout the day. The aquarium remains fully operational as of June 2026.
The Ogasawara tank glass panel provides a seamless, immersive view of the larger rays and sharks.
Visit on a weekday evening to experience the 'Blue Night' lighting, which provides a calmer, more atmospheric aesthetic.
Check the daily program schedule near the entrance upon arrival to coordinate your visit with penguin feeding or diver presentation times.
Combine your visit with an evening trip to the Tokyo Skytree observation deck, which is located in the same building complex.
Avoid visiting on weekends or Japanese public holidays, as the facility becomes significantly congested due to its popularity with families.
Open daily throughout the year, including weekends and holidays; no recurring weekday closures.
Refrain from using camera flash, as it stresses the marine animals, particularly the fish and jellyfish.
