The Tokyo Sky Tree tower, under construction in central Tokyo and already the tallest building in Japan, topped the 400-meter mark Friday, reaching 408 meters in height in the afternoon, its operator said.
The new communications tower in Sumida Ward is scheduled to be 634 meters high, possibly next spring, after extending its antenna. It will be used mainly for terrestrial digital broadcasting.
Friday's work was originally scheduled for Thursday but was postponed due to strong winds, according to tower operator Tobu Tower Sky Tree Co.
Tokyo Tower, a 333-meter communications tower in Minato Ward now used for radio and TV broadcasting, was the country's tallest building for 52 years until Tokyo Sky Tree surpassed it in March.
All the construction, including the interior finish work, is expected to be completed in the winter of 2011.
