Built in 1958, the tower's main sources of revenue are tourism and antenna leasing. Over 150 million people have visited the tower since its opening. FootTown, a 4-story building located directly under the tower, houses museums, restaurants and shops. Departing from here, guests can visit two observation decks. The 2-story Main Observatory is located at 150 meters (492 ft), while the smaller Special Observatory reaches a height of 250 meters (820 ft).
The tower acts as a support structure for an antenna. Originally intended for television broadcasting, radio antennas were installed in 1961 and the tower is now used to broadcast both signals for Japanese media outlets such as NHK, TBS and Fuji TV. Japan's planned switch from analog to digital for all television broadcasting by July 2011 is problematic, however. Tokyo Tower's current height is not high enough to adequately support complete terrestrial digital broadcasting to the area. A taller digital broadcasting tower known as Tokyo Sky Tree is currently planned to open in 2011.