We went to Nagoya Aquarium (名古屋港水族館) today. With the main roads and toll roads, one missed turn we managed to get there in around an hour.
It was slightly overcast and did spit once or twice during the day but with some walking between events, we were warm enough. We saw the dolphins (got our seats 35 minutes before the show started) not too close to the front as some people did get wet when the dolphins decided to start doing belly flops before the start of the show (getting all excited, they knew what time it was!), all the marine life displays and the penguins and white whales.
The girls had a good time seeing and taking everything in.