Osaka Aquarium Kaiyukan: Timed Tickets, Prices and When to Go

Osaka Aquarium Kaiyukan uses dynamic pricing, about ¥2,700-¥3,500 for adults by date, and timed entry to limit numbers, so book online. It's open roughly 10 am to 8 pm (last entry 7 pm). Weekends and holidays are busy from late morning. Go on a weekday at opening, or after 5 pm, when families leave. The highlight is the huge Pacific Ocean tank with whale sharks, which you circle as you walk down.