Tower of Wind Emerges Out of Tokyo Bay interestingengineering.com

It certainly looks like one, though in actuality it's a simple ventilation shaft known as the Tower of Wind.
Maybe simple isn't quite right, a more accurate description would be, stunning innovative design from famed and accomplished architect Toyo Ito.
The Tower of Wind was designed for the Aqua Line that runs under the Tokyo Bay.
Architect Toyo Ito has over 4 decades of experience and ingenuity.
He is famed for the Diechman Library, Tower of Wind along with several museums, hotels and complexes.