Tsūtenkaku is commonly mistaken for the Osaka Tower ( google osaka tower you will understand ) Also I found this article about the Tsūtenkaku tower on wikipedia and found it quite interesting :

“The current tower is actually the second to occupy the site. The original tower, patterned after the Eiffel Tower, was built in 1912, and was connected to the adjacent amusement park, Luna Park, by an aerial cable car. It quickly became one of the most popular locations in the city, drawing visitors from all over the area. The Japanese government dismantled the tower in 1943, believing that it would serve as a reference point for American bombing raids on Osaka: the iron in the tower was melted down and used for war material.” -wikipedia