The building would have also housed offices, commercial facilities, schools, theatres, and other modern amenities.

Land prices in Japan were the highest in the world at the time, but Kisho Kurokawa, one of Japan's most famous architects, has said that staggeringly ambitious buildings employing highly sophisticated engineering are still cheap, because companies pay 90 percent of the cost for the land and only 10 percent for the building.

[3] To mitigate this, triple-decker high speed elevators were proposed and prototyped in labs outside Tokyo.

[3] Although the Sky City gained more serious attention than many of its alternatives, it was never carried out, similarly to projects such as X-Seed 4000 and to ultra-high density, mixed use concepts such as Paolo Soleri's Arcology and Le Corbusier's Ville Radieuse.

If completed, Sky City 1000 would be the tallest man-made structure in the world surpassing the Burj Khalifa.