Tokyo Sky Tree

Tokyo Skytree (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) in March 2011, making it the tallest tower in the world, displacing the Canton Tower,^[2][3] and the second tallest structure in the world after Burj Khalifa (829.84 m/2,723 ft).

One of its main purposes is to relay television and radio broadcast signals; Tokyo's current facility, Tokyo Tower with a height of 333 m (1,093 ft), no longer gives complete digital terrestrial television broadcasting coverage because it is surrounded by many high-rise buildings.

The project was completed on 29 February 2012, with the tower's public opening due on 22 May 2012.^[4]

Earthquake resistance

The tower has seismic proofing, including a central shaft made of reinforced concrete. The main internal pillar is attached to the outer tower structure 125 meters (410 ft) above ground. From there until 375 meters (1,230 ft) the pillar is attached to the tower frame with oil dampers, which act as cushions during an earthquake. According to the designers, the dampers can absorb 50 percent of the energy from an earthquake.^[5]

Broadcasting use

Tokyo Skytree will be used as a radio/television broadcast and communications tower.