(C) Osaka Aquarium Kaiyukan. All Rights Reserved.


According to the Pacific Rim volcanic belt, “Ring of Fire,” KAIYUKAN recreates the vast Pacific Ocean and neighboring environments, so that visitors can easily follow such environments startingfrom Japan Frest, the northwestern part of the Pacific Ocean.

Tank Image  Introduction & ★Main creatures
Aqua Gate
Water volume: 140 tons
Water temperature: 21 degrees C
Tunnel length: 11 meters
Area: 63 square meters
アクアゲート Our tour begins by walking through this 11 meters long tunnel-shaped tank while making you feel like literally walking underwater. Colorful schools of fish playing around are from tropical and subtropical seas.
★Cownose ray, Blotched foxface, and more.
Japan Forest
Water volume: 60 tons
Temperature is the same as that of the outdoors
Water temperature: 15 - 23 degrees C
Area: 430 square meters

The Japan forest with its many trees is designed to take in fresh air and natural sunlight from outside, allowing the atmosphere to change from season to season.
★Asian small clawed otter, Japanese giant salamander, and more.

Aleutian Islands
Water volume: 250 tons
Temperature: 13 degrees C
Water temperature: 10 degrees C
Area: 50 square meters
ラッコ Located in the northern part of the Pacific Ocean, it’s very cold here with the annual average temperature of 5 degrees Celsius. Take a close look at adorable sea otter grooming themselves and sleeping on the surface of the water.
★Sea otter
Monterey Bay
Water volume: 1,050 tons
Temperature is the same as that of the outdoors
Water temperature: 18 degrees C
Area: 250 square meters
アシカ Monterey Bay is located on the West Coast, where many species of marine mammals are found. Let’s discover the daily lives of California sea lions and Harbor seals on land and under water.
★Harbor seal, California sea lion

Gulf of Panama
Water volume: 500 tons
Temperature: 26 degrees C
Water temperature: 22 degrees C
Area: 50 square meters
アカハナグマ Ring-tailed coatis climb up the trees skillfully and agilely while tropical fish species of Panama swim peacefully in the water of Central America.
★Ring-tailed coati, Long-spine porcupine fish, and more.
Ecuador Rain Forest
Water volume: 250 tons
Temperature: 26 - 30 degrees C
Water temperature: 26 degrees C
Area: 150 square meters

The great diversity of the rain forest is represented here including Pirarucu, the world’s largest freshwater fish and Capybara, the unique largest species of rodents in the world.
★Pirarucu, Green iguana, Capybara, and more.

Water volume: 350 tons
Temperature: 0 - 3 degrees C
Water temperature: 10 degrees C
Area: 50 square meters
ペンギン Penguins are swimming as if flying in the water of the south end of the earth.
★Adelie penguin, King penguin, and more.
Tasman Sea
Water volume: 1,350 tons
Temperature: 10 - 26 degrees C
Water temperature: 18 - 23 degrees C
Area: 260 square meters
イルカ Pacific white-sided dolphins, excellent jumpers of the Tasmanian Sea, swim swiftly through water.
★Pacific white-sided dolphin
Great Barrier Reef
Water volume: 450 tons
Water temperature: 26 degrees C
Area: 60 square meters
サンゴ礁 The coral reefs are referred to as "the cradle of the ocean.” How time flies while impressed by the beauty of the nature!
★Species of Butterflyfish and Damselfish, and more.
Pacific Ocean
Water volume: 5,400 tons
Water temperature: 23 - 24 degrees C
Area: 620 square meters
ジンベエザメ The Pacific Ocean--the largest ocean on earth. The huge Whale shark and other marine life swimming slowly and peacefully in the water create the vastness of water planet.
★Whale shark, Scalloped hammerhead, Humphead wrasse, Japanese sardine, and more.
Seto Inland Sea
Water volume: 150 tons
Water temperature: 17 degrees C
Area: 40 square meters

The Seto Inland Sea is located in western Japan.
Let’s search for Common octopuses resting behind rocks or Bastard halibut lying still on the sea bed.
★Barred knife jaw, Red seabream, Japanese spiny lobster, and more.

Coast of Chile
Water volume: 250 tons
Water temperature: 18 degrees C
Area: 40 square meters

Loggerhead turtles swim beautifully using their fore-flippers shaped like paddles.
Except when nesting females haul themselves onto a sandy beach, they stay submerged in water.
★Loggerhead seaturtle, Pink maomao, and more.

Cook Strait
Water volume: 350 tons
Water temperature: 18 degrees C
Area: 40 square meters
ウミガメ Seaturtles and fish from Cook Strait separating the northern and southern islands of New Zealand are exhibited.
★Loggerhead seaturtle, Green seaturtle, Pink maomao, Blue maomao
Japan Deep
Water volume: 80 tons
Water: 11degrees C
Area: 40 square meters
タカアシガニ The exhibit features Giant spider crab, the biggest crab in the world, and other mysterious forms of life of deep sea where no sunlight reaches.
★Giant spider crab, Giant isopod, and more.
Floating Jelly Fish
Water volume: 11 tons in total in 12 tanks
Area: 289 square meters

One of the most renowned collections of jelly fish nationwide. Visitors will be charmed by its magical beauty
★Moon jelly, Brown jellyfish, and more


Look up at the ice on the ceiling and meet Ringed seals smiling at you from the overhead dome tank.
Arctic environment is reproduced here using the real ice. Feel the frigid Arctic while smelling the scent of Ringed seals and hearing them swimming among the ice using their flippers.
★Ringed seal

Falkland Island

Hear, smell, and be amazed by the Rockhopper penguins swimming swiftly in the water or hopping around on the rocks, right before your eyes.
★Rockhopper penguin



At the “Touch pool”, touch and feel the texture of sharks and rays swimming right in front of you. The live coral reefs, often described as “Rainforests of the sea”, are also exhibited.
★Species of sharks and rays

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Popular Fishes and Marine Mammals
Research Activities
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(C) Osaka Aquarium Kaiyukan. All Rights Reserved.