Look up. That slender lattice tower rising above the streets of Shinsekai, in Naniwa Ward, Osaka, is Tsūtenkaku, written 通天閣 in Japanese. The name means the tower that reaches through to heaven. It is an observation tower belonging to the Nankai group, and it is one of the most recognizable symbols of Osaka. What you are looking at is actually the second Tsūtenkaku. The first one appeared in 1912, and the tower standing today was built in 1956. In 2007 it was registered as a Tangible Cultural Property, and its official mascot is a cheerful figure named Billiken. Over the next few minutes we will follow the tower from its first life as part of an amusement park, through its disappearance, to its return as a symbol of recovery. We will also look closely at its design, the clever details on its walls and legs, and the way it keeps working while it is being strengthened.