Tokyo Skytree is a broadcasting and observation tower in Sumida, Tokyo. It became the tallest structure in Japan in 2010 and reached its full height of 634.0 meters (2,080 ft) in March 2011, making it the tallest tower in the world, displacing the Canton Tower, and the second tallest structure in the world after the Burj Khalifa (829.8 m/2,722 ft).

The height of 634 m (2,080 ft) was selected to be easily remembered. The figures 6 (mu), 3 (sa), 4 (shi) stand for “Musashi”, an old name of the region where the Tokyo Skytree stands.

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