Tokyo Skytree is a broadcasting and observation tower in Sumida, Tokyo. It became the tallest tower in Japan in 2010 and reached its full height of 634 meters (2,080 ft) in March 2011, making it the tallest tower in the world, displacing the Canton Tower, and the third tallest structure in the world after Merdeka 118 and the Burj Khalifa. It is the tallest freestanding tower in the OECD, the G20 and G7 countries.

Tokyo, officially the Tokyo Metropolis, is the capital city of Japan and one of the most populous cities in the world, with a population of over 14 million residents as of 2023. The Greater Tokyo Area, which includes Tokyo and parts of six neighbouring prefectures, is the most-populous metropolitan area in the world, with 40.8 million residents as of 2023.