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Water city: Obayashi unveils ambitious concept inspired by Tokyo's past

Obayashi's concept would provide a new gateway to the ocean with a large cruise ship terminal in Tokyo Bay off Haneda Airport.

TOKYO   Leading Japanese real-estate developer Obayashi has unveiled a concept that would transform Tokyo into a city of water after the 2020 Olympic Games. The plan, dubbed Smart Water City Tokyo, calls for, among other things, the construction of a gigantic tunnel 14km in circumference and 50m underground. The tunnel would store rainwater for use by commercial facilities, as well as serving as a waterway for amphibious vehicles and ensuring the smooth running of the city.

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