The aquarium's theme is "interacting with the ocean and rivers," and visitors can enjoy a 22-meter-long tunnel tank, a soothing jellyfish exhibit, and an area where sea turtles, sharks, and rays swim. The tunnel offers a immersive experience, with waterscapes not only overhead but also in front and behind, creating an underwater stroll. The penguin and seal tanks are also designed for close-up views. The easy-to-navigate layout and photogenic nature of the aquarium make it appealing for families.

Enjoy a variety of animal performances, including dolphin shows, seal and sea lion shows, and learn about marine life. The Dolphin Stadium can fill up on busy days, so it's best to secure a seat early.

Since the aquarium is mostly indoors, you can enjoy the aquarium regardless of the weather. A free shuttle bus runs from JR Oimachi Station (except on closed days).

Surrounded by a lush park, we recommend exploring the pond and playground area after viewing the exhibits. A half-day itinerary can be organized around the entire park.