Tokyo Sky Tree (634 meters in height when completed in 2011) is under construction in Sumida Ward, Tokyo.
It has already exceeded Tokyo Tower. is exceeded.
English official site on Tokyo Sky Tree:
A local association of the Deaf decided how to express the Tokyo Sky Tree in sign language.
Yasuo Shoji (60), president of the local association of the Deaf shows how to sign for "Tokyo Sky Tree".
(left) make the finger spelling of "su" with both hands, and then
(right) move the hands upward.
They are enthusiastic to spread the sign representing the newer and higher tower, "We want to make it known to the whole country".