Shimizu to create Green Float environmental island


Japanese construction and engineering firm Shimizu Corporation has envisaged a sustainable botanical city concept named the ‘Green Float’ featuring the world’s tallest building.


The work on the new carbon negative floating city powered by renewable energy has begun in Japan by a team of scientists, engineers and financers. The one km tall tower will feature a vertical farm balanced on a floating concrete lilypad.

The city will be located in the equatorial region where the sunlight is abundant and the impact of typhoons is minimal. The project requires the construction of huge artificial rafts never been built on this scale.

The Green Float scheme will include ‘A City in the Sky’; a waterside resort with a sense of the ocean and greenery; industry incubation office and plant factory; and an urban village that grows like a lily floating on the water.

‘A City in the Sky’ will be designed as an energy-conserving compact city that is pleasant and peaceful, with no strong winds and a temperature of about 26-28°C year-round. The waterside resort contains low-rise townhouses designed to provide residential space for about 10,000 inhabitants.

The New Industry Incubation Office and Plant Factory will provide work zone for about 10,000 people. Future businesses that fuse nature and technology will be located here. The urban compact village with a walkable radius of one km is defined as a cell or district. Cells are added to form modules or cities, which join to form units or countries.

Shimizu is planning to use magnesium alloys derived from seawater as the prime structural material to build the tower. Once an island with a diameter of three km is created, each new floor of the tower will be built at ground level, pushing the previous floor down into the sea. When the 1,000-meter mark is reached, the tower will be raised to its full height.

To create a carbon negative system, environmental technologies will be employed. A range of natural energy sources including space solar power satellites, ocean thermal energy conversion, waves, wind and solar power will generate the required power.

By the year 2025, the necessary technology should be ready to start the building process. Once completed, the building will become the world’s tallest, overtaking the Burj Khalifa in Dubai.








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