Otaru Aquarium is a must-visit spot in Hokkaido, Japan, known for its adorable penguins, friendly seals, and engaging shows by dolphins and sea lions. With over 60 years of history, this aquarium offers a variety of exhibits showcasing sea creatures from the cold waters of the Sea of Okhotsk to the playful antics of harbor porpoises. Visitors can also enjoy feeding the seals and watching the Steller sea lions dive. Don't forget to say hi to the mascot characters, Hacchan and Nanachan, for a warm welcome!