Tokyo International Exhibition Center, commonly referred to as "Tokyo Big Sight", is a convention center in Odaiba where events like the world-famous Comiket (Comic Market) and Tokyo International Anime Fair are held. Even if you don't plan to attend the Comiket (August and December) or Anime Fair (February or March), Big Sight is worth a visit. There's always an interesting event hosted at some corner of the vast Tokyo International Exhibition Center, whether it has to do with anime, pottery, food, or job-hunting. Fans of Claes Oldenburg and Coosje Van Bruggen, Michael Craig-Martin and Lee U-Fan shouldn't miss their artwork on display, either.
Tokyo International Exhibition Center a.k.a Tokyo Big Sight is 3 minutes on foot from Kokusai-Tenjijo-Seimon Station on the Yurikamome, 7 minutes on foot from Kokusai-Tenjijo Station on the Rinkai Line. Check http://www.bigsight.jp/english/index.html for details on parking etc.