Tokyo Tower, a long-standing landmark of the capital, celebrated its 50th birthday on Dec. 23. It still attracts about 3 million visitors a year and has provided the metropolis with good TV reception for decades.

The tower is often regarded as a symbol of Japan's postwar economic growth and development, but now a taller tower is under construction in Sumida Ward.

What is the history of Tokyo Tower and what will happen to it after the new one is completed? Following are basic questions and answers about the landmark: