Tree (東京スカイツリー Tōkyō Sukai Tsurī ? ), formerly known as New Tokyo Tower (新東京タワー Shin Tōkyō Tawā ? ), is a broadcasting, restaurant, and observation tower in Sumida, Tokyo , Japan. It became the tallest structure in Japan in 2010 [1] and reached its full height of 634.0 metres (2,080 ft)