Aquarium Dedicated to the Seas Around the Kii Peninsula
One of the most distinctive features of Kyoto University Shirahama Aquarium is that all of the animals on display are species found in the seas around the Kii Peninsula.
Rather than collecting unusual marine animals from around the world, the aquarium focuses on helping visitors understand the marine environment immediately surrounding Shirahama. This local focus allows visitors to discover the remarkable biodiversity of the waters they can actually see from the nearby coast.
The Kuroshio Current, a warm ocean current flowing northward along the Pacific coast of Japan, has a major influence on the marine environment around Shirahama. The warm waters support not only temperate species but also many subtropical organisms, creating an exceptionally diverse marine ecosystem.
The coastal environment itself is also varied, including rocky shores, sandy bottoms, tidal flats, and seaweed beds. Each environment provides a habitat for different kinds of marine life.
Approximately 500 species are displayed at the aquarium at any given time. Its particularly extensive collection of marine invertebrates, including corals, starfish, sea urchins, sea cucumbers, shrimp, and crabs, is one of the aquarium’s greatest attractions.
A Unique Aquarium Where Invertebrates Take Center Stage
At many aquariums, fish are the main attraction, while invertebrates are often presented as supporting exhibits. At Kyoto University Shirahama Aquarium, the situation is quite different.
Here, visitors can take a close look at the fascinating world of marine invertebrates. Brilliant corals, anemones with delicate waving tentacles, unusual sea cucumbers, starfish, and distinctive sea urchins reveal just how diverse and fascinating these animals can be.
A special exhibit featuring more than 15 species of sea urchins is particularly impressive. Other unusual exhibits include barnacles, basket stars, and ascidians, organisms that are rarely given such detailed attention in ordinary aquariums.
Detailed information files are provided beside the tanks. They explain each animal’s characteristics, classification, anatomy, and differences from closely related species. Scientific names, the names of the scientists who described the species, and the year of naming are also provided, reflecting the aquarium’s strong academic character.
The Impressive First Exhibition Room
One of the first sights visitors encounter is the impressive First Exhibition Room, which features a huge 240-ton aquarium tank.
Large pelagic fish such as giant trevally, bigeye trevally, yellowtail, and greater amberjack swim through the spacious tank. The giant trevally, which can reach approximately one meter in length, is particularly impressive.
Sharks and rays are also displayed, providing a dynamic introduction to the marine environment of the Kii Peninsula. The large tank offers a classic aquarium experience while remaining closely connected to the local waters.
The Second Exhibition Room: A World of Marine Diversity
The Second Exhibition Room represents the academic character of Kyoto University Shirahama Aquarium particularly well. Marine organisms are arranged according to their biological classifications, allowing visitors to compare a wide variety of species.
The exhibits include cnidarians such as corals, jellyfish, and sea anemones; arthropods such as shrimp and crabs; and echinoderms such as sea urchins and starfish.
Detailed explanations prepared by researchers and aquarium staff accompany individual exhibits. Visitors can therefore learn about marine biology while observing the actual animals.
A magnifying-lens area also allows visitors to take a closer look at small and unusual creatures. This hands-on approach makes the exhibits enjoyable for both children and adults.
The Third Exhibition Room: Discover Something New Each Season
The Third Exhibition Room features seasonal and unusual marine organisms. Because the exhibits can change depending on current research and collection activities, visitors may discover something different each time they return.
One of the most popular animals is the brilliantly yellow Ogawakari Sea Anemone. This rare species has been confirmed only in limited areas, including the waters around Shirahama and Izu Oshima, and is affectionately regarded as something of the aquarium’s “panda” because of its special popularity among visitors.
The room also includes specimens of the giant isopod and panels introducing current research. These displays provide an opportunity to appreciate the aquarium not only as a place to see animals but also as an active center of scientific study.
The Fourth Exhibition Room: Marine Habitats Recreated
The Fourth Exhibition Room recreates several different coastal environments, including tidal flats, rocky shores, seaweed beds, and sandy sea floors.
The tidal-flat tank is particularly interesting because the aquarium artificially reproduces the cycle of high and low tides. Visitors can observe creatures such as mudskippers and fiddler crabs living in an environment designed to resemble their natural habitat.
This sophisticated approach to habitat reproduction has attracted attention from professionals working in the aquarium field as well. It demonstrates how scientific knowledge can be incorporated directly into the design of an educational exhibition.
The latter part of the exhibition area introduces various groups of fish according to their classification, allowing visitors to compare their characteristics and understand the diversity of marine life.
The Seto Marine Biological Laboratory and a Tradition of Natural History
The aquarium is closely connected with the Seto Marine Biological Laboratory, which was established in 1922. For many years, researchers have conducted studies on the classification, ecology, and biology of marine invertebrates at the laboratory.
The facility has played an important role in the development of natural history research in Japan. Even as modern biology increasingly focuses on molecular and microscopic research, the laboratory continues the tradition of observing, identifying, and understanding living organisms in their natural context.
This emphasis on natural history is one of the most valuable characteristics of the aquarium. Visitors can see real organisms while learning how scientists distinguish species, study their characteristics, and understand their place within marine ecosystems.
One of Japan’s Historic Aquariums
Kyoto University Shirahama Aquarium has a long history. It was opened to the public in 1930, commemorating the first anniversary of Emperor Showa’s visit to Shirahama.
During World War II, the facility was requisitioned by the Japanese Navy and temporarily closed. After the war, it reopened and continued its activities as an aquarium connected with marine research and education.
It is regarded as having the third-oldest history among aquariums currently operating in Japan. Over the decades, generations of visitors have come here to discover the marine life of Shirahama.
In 2014, the building underwent seismic reinforcement and renovation, creating a safer and more comfortable environment for visitors while preserving the aquarium’s long-standing character.
Special Tours Led by Researchers
During school holidays, including spring, summer, and winter breaks, the aquarium offers special tours led by researchers and aquarium keepers.
Participants can hear directly from university researchers and staff about the characteristics of the animals on display, their behavior, and the latest scientific research. This provides a unique experience that is difficult to find at conventional commercial aquariums.
The explanations are designed to be accessible even when discussing scientific subjects, making the tours popular with both young visitors and adults who have a strong interest in marine life.
Conveniently Located for Shirahama Sightseeing
Kyoto University Shirahama Aquarium is approximately 20 minutes by car from JR Shirahama Station and about 25 minutes by car from the Nanki-Shirahama Interchange on the Kisei Expressway.
The aquarium can also be reached by Meiko Bus. The Rinkai bus stop is only a short walk away, making it accessible even for visitors traveling without a car.
Its location near major attractions such as Shirahama Onsen, Engetsu Island, and Sandanbeki makes it easy to include in a sightseeing itinerary around Shirahama.
Location
459 Shirahama, Nishimuro District, Wakayama Prefecture, Japan
Opening Hours
9:00 a.m.–5:00 p.m.
Last admission: 4:30 p.m.
Open year-round.
Aquarium Where Learning and Wonder Come Together
Kyoto University Shirahama Aquarium is much more than a recreational aquarium. It is also an important educational facility where visitors can experience marine biology and natural history in an accessible and engaging way.
Its extraordinary collection of marine invertebrates, detailed scientific explanations, habitat-based exhibits, and close connection with university research make it unlike many other aquariums in Japan.
For international visitors, the aquarium offers an opportunity to discover the marine biodiversity of the Kii Peninsula while gaining a deeper understanding of the scientific research carried out in Shirahama.
Discover the Hidden World Beneath Shirahama’s Waters
After enjoying Shirahama’s beaches, hot springs, and spectacular coastal scenery, a visit to Kyoto University Shirahama Aquarium offers a different perspective on the region. Instead of simply looking at the sea from the shore, visitors can discover the remarkable creatures and ecosystems living beneath its surface.
For travelers interested in nature, marine life, science, and Japanese academic culture, Kyoto University Shirahama Aquarium is an unmissable destination where learning and discovery go hand in hand.