When we arrived to Osaka we got help from the information center as well as the station where the aquarium was with passes and maps. The passes were those sheets with the cute whale shark cards. They could be used to travel on the way to the aquarium as well as a pass into the aquarium. I think they were around 2,400 yen a piece, but a great deal nonetheless since the aquarium ticket was already 2,000 or so yen a piece.
This is the cute pamphlet that came with the bus pass along with a coupon book!
