Osaka Aquarium Kaiyukan is one of the world's largest aquariums and a landmark of Osaka's Tempozan Harbour Village, housing whale sharks — the largest fish species on earth — in a central tank holding 5,400 tonnes of water. The aquarium's Pacific Ocean Ring of Fire concept follows marine life from the coast of Japan through the Pacific to the Antarctic, passing through 15 themed zones across eight floors connected by a gradual descending ramp.
Kaiyukan Highlights & Exhibits
🦈 Pacific Ocean Tank — Whale Sharks
¥2,700The centrepiece of Kaiyukan is the Pacific Ocean tank — a 34-metre deep, 9-metre wide tank holding 5,400 tonnes of saltwater and housing whale sharks alongside manta rays, schools of yellowfin tuna, and hundreds of other Pacific species. The whale sharks (typically 4–6 metres in length) are among the few in captivity anywhere in the world. Visitors descend through the aquarium on a ramp with floor-to-ceiling acrylic panels offering views at multiple depths.
🌊 Ring of Fire Route — 15 Zones
IncludedKaiyukan's layout traces the Pacific Ring of Fire concept from the Japan Forest zone (giant spider crabs, Japanese giant salamander) through the Aleutian Islands (sea otters), Monterey Bay (giant Pacific octopus), the Ecuador/Gulf of Panama zones, the Pacific Ocean tank, and concluding with the Antarctic Ocean zone (penguin colonies viewed through an underwater window). The gradual ramp descent means no backtracking.
🦦 Sea Otter Feeding Sessions
IncludedThe Aleutian Islands zone houses a population of sea otters — naturally floating on their backs using their stomachs as tables while cracking shellfish. Feeding times are posted daily and draw crowds; the otters are observed through an underwater viewing area as well as from above the waterline. The otter exhibit is a consistent highlight for families and consistently the most photographed zone after the whale shark tank.
🎡 Tempozan Ferris Wheel & Marketplace
¥900Kaiyukan is located in the Tempozan Harbour Village complex, which includes the Tempozan Giant Ferris Wheel (one of Japan's largest at 112m, offering views of Osaka Bay and the cityscape), the Naniwa Kuishinbo Yokocho food village recreating Showa-era Osaka street food culture, and the Tempozan Marketplace shopping area. A combined aquarium and ferris wheel ticket (¥3,500) is available.
🐠 Touch Tank Experiences
IncludedShallow touch tanks allow direct contact with smaller marine species — rays, small sharks, starfish, and sea cucumbers in supervised petting pools. Sessions are available throughout the day at no additional cost. The Japanese Garden zone also features jellyfish tanks with timed colour-changing backlighting, particularly popular for night aquarium visits when the standard admission evening rate applies.
🌙 Kaiyukan at Night (Evening Sessions)
¥2,700From Friday evenings and holidays (typically 17:00–20:00), Kaiyukan operates evening sessions at the same admission price with significantly reduced crowds. The whale shark tank and jellyfish zones are particularly atmospheric in lower light. The surrounding Tempozan Harbour area with its waterfront views of Osaka Bay and the illuminated ferris wheel makes the evening combination one of Osaka's better date-night or family evening outings.
Stay in Osaka near Kaiyukan
Staying in Osaka puts you within easy metro access of Kaiyukan, Universal Studios Japan, and Dotonbori. The Osakako metro line connects Tempozan to central Osaka in 10 minutes.
Frequently Asked Questions
How much does Osaka Aquarium Kaiyukan cost and how do I buy tickets?
Standard admission to Kaiyukan is ¥2,700 for adults, ¥1,400 for children aged 7–15, ¥700 for children aged 3–6, and free for under-3s. Tickets can be purchased at the aquarium entrance or in advance online via the official Kaiyukan website and selected third-party booking platforms — advance online booking is recommended during peak periods (Golden Week, summer school holidays, New Year) when queues at the ticket counter can exceed 60 minutes. A combined ticket with the Tempozan Giant Ferris Wheel costs ¥3,500 for adults and saves ¥100 versus buying separately. Various Osaka tourist passes (e.g. Osaka Amazing Pass, Osaka e-Pass) include Kaiyukan admission — check if any passes you hold cover entry before paying full price.
How do I get to Osaka Aquarium Kaiyukan?
Kaiyukan is at Tempozan Harbour Village, reached most easily by the Osaka Metro Chuo Line to Osakako Station (Exit 1, then 5 minutes on foot following waterfront signs). The journey from central Osaka (Honmachi or Shinsaibashi) takes approximately 10 minutes by metro. From Osaka Station/Umeda, take the Osaka Metro Chuo Line from Honmachi (one stop from Hommachi on the Midosuji Line). By water bus, the Tempozan route connects Universal Studios Japan to Kaiyukan and is a scenic 30-minute alternative. Driving is possible but parking costs approximately ¥1,500 per day; public transport is more convenient. The aquarium is within walking distance of Tempozan Bridge and the Osaka Bay waterfront promenade.
How long does it take to visit Osaka Aquarium Kaiyukan?
A standard visit takes 2–3 hours at a comfortable pace — the single descending ramp route makes it easy to see everything without backtracking. Families with children may spend longer at the touch tanks and feeding sessions (check the daily schedule at the entrance for timing). If combining with the Tempozan Ferris Wheel and the Naniwa Kuishinbo food village, plan for 4–5 hours total. Kaiyukan is busiest from 10:30 to 14:00, particularly on weekends, Golden Week (late April to early May), and summer school holidays (late July to late August). Arriving at opening time (10:00) or in the late afternoon (after 15:00) reduces wait times significantly. The aquarium has a clear one-way route so there is no doubling back, making it efficient even with crowds.
What is near Osaka Aquarium Kaiyukan?
Kaiyukan anchors the Tempozan Harbour Village area, which includes the Tempozan Giant Ferris Wheel with panoramic bay views, a marketplace with souvenir shops, and the Naniwa Kuishinbo Yokocho — a recreated 1970s Osaka alley with takoyaki, okonomiyaki, kushikatsu, and other Osaka street food staples. The water bus to Universal Studios Japan (USJ) departs from Tempozan Pier, making a combined USJ-morning, Kaiyukan-afternoon itinerary feasible. The nearby Sakurajima area (accessible by JR Osaka Loop Line) is the entry point for USJ. Osaka's Minami (Dotonbori) district is approximately 25 minutes by metro from Osakako Station, making a Kaiyukan morning followed by Namba afternoon a natural pairing.