The tallest of the three is the Tokyo Metropolitan Government Building No.1, a tower 48 stories tall that splits into two sections at the 33rd floor.

The design of the building was meant to resemble an integrated circuit,[2] while also evoking the look of a Gothic cathedral.

The two panoramic observation decks, one in each tower on floor 45 (202 meters (663 ft) high), are free of charge to the public and contain gift shops and cafes.

It replaced the old city hall at Yūrakuchō, which was built in 1957 and also designed by Tange, which is now the site of the Tokyo International Forum.

[6] At 242.9 meters (797 ft),[1] it was the tallest building by roof height in Tokyo until 2007, when the Midtown Tower was completed.