Right next to Tokyo Disneyland is Disneysea. We spent a day and a half here and still feel it’s not enough time. It has 7 themed ports of call: Mediterranean Harbor, Mysterious Island, Mermaid Lagoon, Arabian Coast, Lost River Delta, Port Discovery and American Waterfront. You should see this place day and night! It’s magical. The park is more for grown ups but I took my then 18 month old and she enjoyed it very much. You would be surprised how much they learn and remember. As I mentioned before, we purchased the 3 day magic pass to fully enjoy both the themed parks.
And to get to Tokyo Disneyland/Disneysea we left from Shinjuku Station in Tokyo.