In Mirai Kan or The National Museum of Emerging Science and Innovation you’ll see lots of robots and other awesome technologies! Also, the famous robot Asimo by Honda has it’s own show. While there’s already so much to do in Odaiba, Mirai kan is well worth the visit.
Entry fee is only 600 yen.
Official (English) Website: http://www.miraikan.jst.go.jp/en/