Found in the Tempozan Harbor Village near the Osaka Bay area, Osaka Aquarium or Kaiyukan is one of Japan’s most respected aquariums. Kaiyukan is one of the largest public aquariums in the world and is sure to captivate those who explore its exhibits, home to 30,000 marine animals from across the Pacific Ocean. What makes the Osaka Aquarium so special is innovate and interactive approach that really allows visitors to connect with its theme and the creatures that call the aquarium home. Here’s everything you need to know to make the most of a visit to Osaka Aquarium Kaiyukan with your Japan Rail Pass.
Osaka Aquarium Kaiyukan
More than just your local aquarium, the Osaka Aquarium is a state-of-the-art complex dedicated to marine life from around the Pacific Rim. To properly showcase these creatures from around the Pacific, Kaiyukan recreates the natural environment of their different habitats. This theme revolves around the idea of the “Gaia Hypothesis”, suggesting that in some ways the Pacific Ocean region acts as one single ecosystem.
Elsewhere, don't miss the Arctic zone, where ringed seals dive through a domed tank, and the Jellyfish Galaxy (Kurage Kingdom), a darkened, softly-lit gallery of drifting jellyfish that's a favourite for photographers. The Tasman Sea exhibit is home to Pacific white-sided dolphins, while rockhopper penguins in the Antarctica zone can often be seen from barely a metre away.
This means you can see an incredibly diverse selection of marine animals here, with 620 species calling the aquarium home. Dolphins, penguins, otters, sea lions, whale sharks and jellyfish are among the many animals on display here. With so much to see, both children and adults are sure to be impressed by what they see at the Osaka Aquarium. No wonder it’s one of Osaka’s most popular tourist attractions.
Aquarium Permanent Exhibits
As if the animals at the aquarium weren’t impressive enough on their own, wait until you see how the Osaka Aquarium is set up. Over the course of a tour, visitors are taken past 15 large tanks, each dedicated to a different region around the Pacific Rim. Things start quite spectacularly with the “Fish Underpass – Aqua Gate” aquarium shaped like a tunnel that you pass through.
Journeying up to the building’s eighth floor, you’ll begin a process of slowly working your way back down, starting with the “Japan Forest” exhibit full of trees and greenery. Other exhibits within the aquarium include “Antarctica,” which is home to penguins, and “Great Barrier Reef,” full of vibrant, tropical fish. Many of the exhibits span across multiple floors, meaning you’re treated to different perspectives on these complex habitats.
However, the star attraction at Kaiyukan is the “Pacific Ocean” exhibit. That’s because it has the largest tank in the aquarium at 9 metres deep, making it suitable as the habitat for the two gigantic whale sharks, the largest species of fish alive in the world today.
Feeding Times and Aquarium at Night
Osaka Aquarium also has various special activities that make a visit here much more than just looking at each of the different habitats. This includes the various interactive elements introduced to the aquarium, like recreating the climate, smells, and sounds for certain habitats. Some exhibits like the Maldives Zone allow guests to actually touch sharks and rays in the water.
Then there are feeding times, where guides will provide special talks explaining the biology and habits of creatures. And to see things in a new light, stick around until 5pm when the aquarium enters its “Kaiyukan Night Aquarium” mode. At this time, the music and lighting inside change, changing the entire mood to one of a moonlit night.
Tempozan Harbor Village
While the Osaka Aquarium is the most popular attraction in the Osaka Bay area, it’s just one of part of Tempozan Harbor Village. This waterfront area boasts various family-friendly attractions, not to mention loads of places to sample Japanese cuisine. Head to the Naniwa Kuishinbo Yokocho to try various Japanese street food, while the Tempozan Giant Ferris Wheel will provide you with some stellar views across the bay and city.
Tips for Visitors to Osaka Aquarium
Visiting the Osaka Aquarium is easy with a JR Pass. From JR Osaka Station, take the JR Osaka Loop Line to Bentenchō Station (covered by your pass), then transfer to the Chuo Subway Line and ride two stops to Osakakō Station. The aquarium is about a five-minute walk from there. Note that the short subway leg is not covered by the JR Pass, so you'll pay a small separate fare. A fun alternative: if you're coming from Universal Studios Japan, the Captain Line ferry takes about 10 minutes across the bay.
Opening hours are generally 10:00 to 20:00, though they vary by season (the aquarium sometimes opens earlier, around 9:00, in busy periods) and there are occasional maintenance closures. Always check the official website before you go.
Tickets are for a designated date and entry time, and are best booked online in advance — the aquarium is one of Osaka's most popular attractions and slots for busy days sell out. Adult admission has been around ¥2,400–2,700 in recent years, and prices can vary by day (weekends and holidays are typically dearer), so please check the current price when booking rather than relying on a fixed figure.
Roberto Oro
Rob is a world traveller who prefers the warmer spots on earth, and loves to spend his summers in Kyushu and Okinawa. He's been writing at the JR Pass blog for over 4 years, from his home town of Kumamoto.
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