Tokyo Skytree, the world’s tallest tower, opens next week.

The Tokyo Skytree, twice as tall as the Eiffel Tower, opens next week as Japanese train operators counter an aging population by building malls, offices and tourist attractions.

The 634-meter (2,080 feet) structure in eastern Tokyo sits in a retail complex housing more than 300 shops and restaurants, a planetarium and an aquarium. Developer Tobu Railway Co. (9001) expects the project to draw 32 million visitors in its first year, surpassing [...]