Niigata City Aquarium Marinepia — Sea of Japan Megafauna
Marinepia Nihonkai is a coastal aquarium specializing in Sea of Japan marine life, featuring species rarely seen in other Japanese aquariums: giant Pacific octopus (up to 3m arm span), Steller sea lions, and schools of yellowtail amberjack (buri) in a 750-ton main tank. The aquarium's dolphin stadium sits directly on the coast with the actual Sea of Japan as backdrop — during performances, wild seabirds often fly through the frame, creating amusing interactions with the captive dolphins.
The aquarium also maintains a cold-water jellyfish gallery showcasing 15+ species from the Sea of Japan's deep waters, including the rarely-displayed Lion's Mane jellyfish (up to 2m diameter). The backlit tanks and slow-motion movement create a meditative atmosphere.
Essential Information
Opening Hours
9:00–17:00
Closed: Open daily year-round
Entrance Fee
¥1,500 adults, ¥600 children
Best Season
Year-round; buri (yellowtail) feeding daily 14:30; dolphin shows at 11:00, 13:00, 15:00
Visit Duration
2–3 hours for full aquarium plus dolphin show and coastal promenade walk
Getting There
Access Information
Insider Guide
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