The large 'Sea of Japan' display tank contains approximately 800 tons of water to mimic the regional marine environment.
The aquarium participates in the protection and rehabilitation of local stranded sea turtles found along the Niigata coast.
The facility was completely rebuilt and reopened in its current form in 2013 to modernize its research and display capabilities.
A specialized 'Marine Mammal Hall' allows visitors to view seals and sea lions from both above and below the water surface.
The architectural design of the main building incorporates curved lines intended to represent the rhythmic movement of ocean waves.
The aquarium holds a notable collection of deep-sea species native to the trenches located off the coast of the Sea of Japan.
Niigata City Aquarium Marinepia Nihonkai focuses on the ecosystem of the Sea of Japan, housing approximately 20,000 marine animals from 450 distinct species. The facility features a signature Marine Tunnel that allows visitors to walk beneath a massive tank while surrounded by sharks and rays. Its outdoor Dolphin Stadium hosts regular performances where dolphins interact with trainers against the backdrop of the Sea of Japan. A major highlight is the large-scale 'Sea of Japan' water tank that simulates the natural coastal currents and life zones of the local sea. The aquarium also maintains a dedicated marine mammal section with spotted seals and Humboldt penguins. Educational exhibits detail the environmental research conducted on local aquatic biodiversity. It is designed to provide an immersive experience reflecting the distinct characteristics of the Niigata coastline.
Inside the Marine Tunnel, where the overhead sharks and rays provide a dramatic backdrop.
Check the daily schedule board immediately upon entry to time your visit around the dolphin and sea lion performance windows.
Walk through the Marine Tunnel twice, once during the peak of the day and again near closing, to observe differences in animal activity.
Bring a light jacket if visiting outside of summer, as the coastal winds near the outdoor stadium can be brisk.
Do not attempt to feed the animals or tap on the glass panels of the tanks.
Closed for a multi-day inspection period annually, typically in the winter months.
Refrain from using flash photography in tanks housing deep-sea or light-sensitive species. Maintain quiet levels near the touch pools.
