๐ Japan Cruise Day 4: Osaka Aquarium Kaiyukan & The Eki Stamp Book Adventure ๐
Osaka Aquarium Kaiyukan & Eki Stamp Book Adventure | Celebrity Millennium Japan Cruise Day 4

โจ Don’t Forget Your Eki Stamp Book! Before even stepping inside, here’s my favorite little travel hack: bring your Eki Stamp Book! ๐ If you’ve never heard of it, Japan has a long tradition of collecting stamps (called eki stamps) at train stations, tourist spots, and attractions. I was worried I wouldn’t get mine stamped since we hadn’t taken trains on this trip… but jackpot! ๐ The aquarium has plenty of adorable stamps just waiting for your collection. It’s such a fun and inexpensive way to capture memories while traveling Japan.
Fun Fact: Eki stamps started in the 1930s as a way to promote train travel. Now, they’re beloved by kids and adults alike, turning sightseeing into a collectible adventure. Some travelers even plan their trips just to collect rare stamps!
๐ The Star of the Aquarium: The Whale Shark One of the main highlights of the Osaka Aquarium Kaiyukan is its gigantic tank featuring a whale shark—the largest fish species kept in any aquarium. Seeing this gentle giant up close is an experience you’ll never forget. Along with the whale shark, Kaiyukan houses over 620 species, from playful otters to penguins and manta rays.

๐จ๐ฉ๐ง Perfect for Families & Cruise Travelers If you’re traveling with kids, this is hands-down one of the best family-friendly stops on your Japan cruise. Between the massive tanks, colorful fish, and the stamp book adventure, there’s something for everyone to enjoy. And since it’s so close to the port, it’s an easy excursion with plenty of time to explore Osaka afterward.
So if you’re sailing on the Celebrity Millennium or planning a Japan itinerary, don’t just stop by the aquarium—stamp your way into your Japan memories too. ๐
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