Shinagawa Aquarium

Shinagawa Aquarium (しながわ水族館) is home to over 2,500 large fish and 100 species and seems to fit a lot into a relatively small area. Located within the lush greenery of Shinagawa Kumin Park, this facility acts as a resolute guardian of marine education for southern Tokyo. The aquarium is spread over two floors, beginning with the “Sea of Shinagawa” on the first floor, which focuses on the diverse marine life found in Tokyo Bay. This provides a rare “lull” where the boundary between the familiar city and the mysterious depths just off its shores becomes beautifully blurred.

Submerged Wonders and Spectacles

Descending to the basement “Undersea World,” visitors find the 22-meter long underwater tunnel. As you walk through, you are surrounded by 500 tons of water, offering a visceral perspective on rays, giant sea turtles, and schools of shimmering fish swimming overhead. This immersive technical ingenuity provides a high-value experience for families, as the smaller scale of the tanks allows for an intimate view of the animals that larger aquariums often lack. The “Ocean Jewel Box” is another highlight, housing vibrant tropical fish from around the world in a display that mimics the complexity of a coral reef.

The main attraction remains the seal and dolphin shows, held at the “Iruka-jima” (Dolphin Island) and the specialized Seal Observatory. Because the stadium is smaller than most, every seat provides a clear view of the dolphins’ athletic prowess and the seals’ playful behavior. Beyond the spectacles, the aquarium features a dedicated “Jellyfish Room” and a “Shark Hall,” where the lighting and tank design create a sophisticated, meditative “vibe.” The transition from the indoor exhibits back to the surrounding park pond creates a multi-layered afternoon of exploration, making it a quintessential destination for those seeking a peaceful detour from the city’s high-energy commercial hubs.

Visitor Information
Address	3-2-1 Katsushima, Shinagawa-ku, Tokyo 140-0012 (Google Maps)
Opening Hours	10:00 AM – 5:00 PM (Last entry 4:30 PM) *Closed Tuesdays.
Price	¥1,350 (approx.)
Website	Official Website

Access
Station	Line(s)	Details
Omori-kaigan Station	Keikyu Main Line	8-minute walk from the station.
Omori Station	JR Keihin-Tohoku Line	15-minute walk from the North Exit or take the free shuttle bus.