There's so much to do on Odaiba, you could never hope to see it all in a single day. Even if the attractions aren't always impressive on an individual basis (and many are simply malls), the very fact that such a large section of Tokyo has been given over to leisure and shopping is amazing. We've written quite a bit about Odaiba already, but here are some other sights which warrant mention.
We had a feeling that our visit to Odaiba Island's Miraikan Future Science Museum was going to be awesome, and we were right. The only disappointment came when it closed, and we had to leave. Officially named the National Museum of Emerging Science and Innovation, this is the most cutting-edge science museum we've ever visited.