Odaiba is more or less one big amusement park and shopping center, so it's a popular spot for foreigners, both residents and tourists.
This makes it an obvious location for a school trip!
Odaiba even has a beach! It may not be the best in Japan but considering how limited your options are in Tokyo, it's not too bad! It'll also be where the Olympic beach volleyball will be played in 2020!
There's a lot to do there! Lots of students are interested in robots and that kind of futuristic technology that Japan loves to show off, so the Odaiba science museum is a good place to see these things in action.
Along with the future, Odaiba also has a retro-style area that brings you back to the good old days of the Showa era! Feel like a kid again with traditional arcades, candy stores, and other retro-themed shops!
Where else in Japan can you experience the future and the past in one day? No matter what your interests are, Odaiba is the place to be!