City Tower Toyosu The Twin, Twin residential towers in Toyosu district, Japan.

City Tower Toyosu The Twin is a residential complex of two 48-storey towers, the North and South towers, completed in June 2009 on the former IHI shipyard site in Koto-ku, Tokyo. Designed by Nikken Sekkei and built by Kajima, the towers rise 171 m and 163 m and together hold 1,063 apartments. Their dark-grey facades with white column accents and glass curtain walls face the Toyosu canal.

The towers were built between 2006 and 2009 as part of the transformation of Koto's waterfront from industrial use to modern residential space. This period marks Tokyo's strategy to revitalize inner-city waterfront areas through high-rise residential development.

The towers shape Toyosu's skyline with their modern design language and show how contemporary Japanese architecture approaches residential living. They represent the new character of this district, which has transformed from an industrial area into a modern residential neighborhood.

The complex sits just a few minutes' walk from Toyosu Station on the Tokyo Metro Yurakucho Line, providing quick access to the city center. The walkway between the two towers and the broad plaza below are pleasant places to stroll through, even if you are just passing through.

The two towers are set at a 45-degree angle to each other so residents do not look straight into the neighbouring building. The top floors are all duplex maisonette units, and the living rooms use fixed windows instead of balconies to keep the canal view open.