Maximum height: 634m

The more you know, the more fun it becomes to look up
An aerial view capturing the Tokyo cityscape and TOKYO SKYTREE in the distance, with Mt. Fuji visible in the background.

Decision on a height of 634m

The Steel framework structure of TOKYO SKYTREE , viewed from below against a blue sky.

A photo of the Official characters and staff taking a commemorative photo at the Guinness World Record certification ceremony for TOKYO SKYTREE.

Aiming to be the best in the world,
The answer was 634m.

The height of TOKYO SKYTREE was initially set at "approximately 610m" from the start of the project. However, from the beginning, we considered making it the world's Free-standing broadcasting tower, and we made structural adjustments based on the scope of achieving that goal. As a result, amidst the planning and construction of high-rise buildings all over the world, we aimed to make it the world's tallest Free-standing broadcasting tower, and after much consideration, we finally decided on 634m. Thanks to these efforts, the 634m tall TOKYO SKYTREE was certified as the world's tallest Tower by Guinness World Records on November 17, 2011.

Impressive numbers

A View of TOKYO SKYTREE towering against the backdrop of the twilight sky and cityscape.

The image shows the number 634 meters, the height of TOKYO SKYTREE, and the word "Musashi".

When deciding on the height of 634m, we wanted it to be an easy-to-remember number, befitting a Tower that is the world's Tower and a symbol of the region.
In this context, the sound of "634 = Musashi" is not only familiar to Japanese people, but it also evokes the name of Musashi Province, one of the old provincial names, which refers to a large area that includes parts of Tokyo, Saitama, and Kanagawa.
The area where TOKYO SKYTREE stands was once part of Musashi Province, according to historical records. From the Tower, you can see Musashi Province, and when you go up to the Observation deck, the ancient landscape comes to life before your eyes, allowing you to reflect on the historical and regional significance of being east of Edo and east of Tokyo.
We believe that using these familiar numbers will make it easier for the general public to remember the height of the TOKYO SKYTREE.