June 18th until June 21st
The Tokyo Toy Show is the biggest of its kind and since its a show for the toy trade, the 18th and the 19th are trade days, but the event is public on the weekend and the entry is free. It is more than a simple trade show though. There will be a stage with entertainment, including the appearances of various characters, a kids park with toys and various activities.
Adress: Tokyo Big Sight, 3-11-1 Ariake, Koto-ku
Access: Kokusai Tenjijo Station, or Kokusai Tenjijo Seimon Station