文章來自這裡
http://www.cnngo.com/tokyo/none/wat...ree-grow-716473
最讓我訝異的就是這句..
But alas, Tokyo Tower (at 333 meters) is not tall enough for transmitting digital broadcasting signals, so the city is rapidly building a new giant vertical landmark: Tokyo Sky Tree. Planned to be completed in 2011, just in time for the TV signal switchover from analog to digital,
數位電視全民化