The Tokyo Sky Tree is a Broadcasting, Restaurant, and Observation Tower under construction in the Narihirabashi/Oshiage area of Sumida ward in Tokyo, Japan. As of 29 March 2010 it is the tallest artificial structure in Japan. When completed, the tower will have a height of 634.00 m (2,080 ft). The present Tokyo Tower (333 m) is not tall enough to give complete digital terrestrial television broadcasting coverage, due to the construction of many nearby high-rise buildings in the central part of the Tokyo Metropolis.
The project is being led by Tobu Railway and a group of six terrestrial broadcasters (headed by public broadcaster NHK). Construction of the tower is scheduled to be completed by December 2011, with the public opening in spring 2012. The completed structure will be the highlight of a massive commercial development around Oshiage Station.
The base of the tower has a structure similar to a "tripod", but from a height of about 350 m and above, the tower's structure is cylindrical to withstand very strong winds.
The tower also has state-of-the-art seismic proofing including a central shaft made of reinforced concrete.
During the period from 26 October to 25 November 2007, suggestions were collected from the general public for the name to be given to the new tower. On 19 March 2008, a committee chose six final candidate names: Tokyo Edo Tower, Tokyo Sky Tree, Mirai Tree, Yume Miyagura, Rising East Tower, and Rising Tower, with the official name to be decided in a nationwide vote. It was announced on 10 June 2008 that the official name of the tower would be Tokyo Sky Tree. Tokyo Sky Tree received around 33,000 votes out of 110,000 cast, with the second most popular name being Tokyo Edo Tower.