Odaiba is a popular shopping and entertainment area on the artificial island in Tokyo bay. Daiba means “fort” and was built as a set of islands to protect Tokyo against possible attacks from the sea towards the end of the Edo Period (1603-1868). Later the small islands were joined together into larger islands by massive landfills.
In front of the DiverCity Tokyo Plaza, you’ll find a “life size” Gundam statue. The Fuji TV building is also worth having a look at.