Sky City 1000

[Albion]

Sky City 1000 is a possible future urban supertall skyscraper project aimed at helping put an end to major congestion and lack of greenspace in the Tokyo, Japan metropolitan area.

The plan consists of a building 1,000 metres (3,281 ft) tall and 400 m (1,312 ft) wide at the base, and a total floor area of 8 km2 (3.1 sq mi).[2] The design, proposed in 1989 by Takenaka Corporation, would house between 35,000[2][3] and 36,000[4] full-time residents, as well as 100,000 workers. It comprises 14 concave dish-shaped "Space Plateaus" stacked one upon the other. The interior of the plateaus would contain greenspace, and on the edges, on the sides of the building, would be the apartments. Also included in the building would be offices, commercial facilities, schools, theatres, and other modern amenities.[2]
Since its announcement, it has garnered a lot of attention from the world's architectural establishment, and was featured on CNN's This Week in Japan in 1989, and on Discovery Channel's Extreme Engineering in 2003.
With the completed Burj Khalifa topping out at 828 meters in December 2009, researchers have started to speculate that a 1000-meter building such as Sky City 1000 could be possible in the next 20 years. [1]
Land prices in Japan are the highest in the world, and Kisho Kurokawa, one of Japan's most famous architects, has said that even staggeringly ambitious buildings employing highly sophisticated engineering are still cheap, because companies pay 90% of the cost for the land and only 10% for the building.[5] Tokyo's only fire helicopter has even been used in simulation tests to see what the danger would be if a fire were to break out in the building.[2] Triple-decker high speed elevators which would be used in the building are also being designed in labs outside Tokyo.[2]
Although this project has gained more serious attention than many of its alternatives, it can be considered similar to projects as X-Seed 4000 and to ultra-high density, mixed use concepts such as Paolo Soleri's Arcology and Le Corbusier's Ville Radieuse.

http://en.wikipedia.org/wiki/Sky_City_1000

Interactive flash presentation...

[Albion]

Good idea apart from three things:

• Its too tall making it a nightmare to engineer
• Its proposed to be built in one of the most earthquake-prone places on the planet
• Being so tall its impractical. We could design structures like this but there is no need for them to be this tall when simply a collection of smaller one's could be built

I'd support something like this is tectonically stable countries and less tall but with a collection of them.
We could also build skyscraper farms to combat shortage of land, I've seen it proposed in the Netherlands.

[ElWolverine]

its a good idea for work out in obverpopulation.