To celebrate the Gundam 30th anniversary, Gundam Big Expo is held in Tokyo Big Sigh from August 21-23, 2009. It is the biggest Gundam event in the history. In the Gundam Big Expo, you can see all the Gundam model since year 1979. For those Gundam fan, beside the 1/1 scale Gundam model, it is another event that you shouldn’t miss.
Official Gundam Big Expo homepage
http://www.gundam30th.net/EXPO/