A Unique Collection of Marine Life: A Guide to the 1,200 Species of Toba Aquarium

By Mio Ieda

Local in Toba

For many travelers visiting Toba, Toba Aquarium is their primary destination. Boasting the largest number of species in Japan, this aquarium does more than just display marine life; it is deeply committed to scientific research, as well as the breeding and conservation of endangered species. We visited to meet the cute, mysterious, and fascinating creatures that call this place home!

Home to 1,200 Species! Japan’s Top Aquarium for Diversity

The story of Toba Aquarium dates back to 1955. It all started when the founder noticed tourists eagerly watching fish in the tanks of a local fishery and thought, "Why not start an aquarium?"

What began as a modest, handmade facility focusing on local Japanese fish has evolved through several expansions into one of Japan’s premier aquariums.

Today, it cares for approximately 1,200 species and 25,000 individual creatures, holding the record for the highest species diversity in the country. A unique feature is the layout: the interior is divided into 12 themed zones with no fixed route, allowing you to spend as much time as you like with your favorite animals.

Rare Encounters Found Nowhere Else in Japan

One of the biggest draws of Toba Aquarium is the chance to meet incredibly rare animals.

Sea Otters: Thanks to their popularity on YouTube, the sea otters (found in Zone I: Polar Oceans) are superstars!

During the three daily feeding sessions, cheers erupt as they skillfully balance shells and squid on their bellies. The bond between the otters—Mei and Kira—and their keepers is heartwarming, as they perform bows and high-fives on cue. Due to their immense popularity, viewing times may be limited.

Dugongs: Did you know the dugong is said to be the inspiration for mermaid legends? Only three are kept in captivity worldwide, and Toba Aquarium is the only place in Japan where you can see one (Zone H: Mermaid Sea). Serena, who arrived as a gift from the Philippine government in 1987, currently holds the world record for the longest time in captivity. The knowledge gained from caring for her is vital for the conservation and artificial rearing of rescued dugongs in the wild.

African Manatees: Often confused with dugongs, African manatees are another rarity you’ll only find here. Watching Mirai, a female manatee in Zone F (Jungle World), glide gracefully through the water is a hypnotic experience that makes you forget the passing of time.

Don't Miss the Lively Shows!

The Sea Lion Show is a signature attraction. From catching Frisbees with precision to impressive high jumps, these energetic performers run, slide, and swim across the stage alongside their trainers, even prompting the audience to clap along!

We also highly recommend the Walrus Interaction Time in Zone L (Water Corridor). The sight of these giants—some weighing over a ton—alongside the popular young walrus, Ichiko, is unforgettable. Tip: Check the bulletin boards or pamphlets immediately upon entry to catch the latest show and feeding schedules!

Endless Fascinations

From vibrant tropical fish and local species of Ise-Shima to adorable penguins, pelicans, and even the Fishing Cat (a feline with webbed feet), there is so much to see. Don't miss the "Living Fossils" like the Palau Nautilus or the bizarre deep-sea creatures in the Laboratory of Strange Creatures.

If you want to catch all the shows and explore every zone thoroughly, be sure to set aside plenty of time for your visit.

Before you leave, stop by the gift shop for original plushies, keychains, and local sweets to take a piece of these wonderful memories home with you!

Would you like me to create a "Top 5 Must-See Animals" summary or a brief guide on how to get there from Toba Station?