World's tallest tower will house 1 million people

Inspired by Mount Fuji, Taisei Construction Corporation has completed designs for construction of the world's tallest building. The X-Seed 4000 would stand at approximately 13,123 feet (4 km), nearly 700 feet (213 m) taller than the real Mount Fuji. The next tallest buildings don't even break 2,000 feet, how puny! While likely to never be built, the X-Seed would have up to 800 floors, and be capable of housing between 500,000 and 1,000,000 people.

Unlike conventional skyscrapers, the X-Seed 4000 would be required to actively protect its occupants from considerable air pressure gradations and weather fluctuations along its massive elevation. Its design calls for the use of solar power to maintain internal environmental conditions. Some estimate that the cost to construct the X-Seed 4000 structure may be somewhere between $300-900 billion US dollars.
Now I'm no astronomer or anything, but if I learned anything in grade school, it's that 13,123 feet is pretty much the distance to the sun. Which means that the top floor would be perfect for a natural sauna. You heard it here first, if they end up doing that I want credit.

A few more conceptual pictures after the jump.

「ビル」と呼んでいいものかどうかすら迷います。

大成建設が1990年に構想した「X-Seed 4000」は、約100万人が居住可能な…マンション？　だそうです。
その外見は上に行くほど細くなる「富士山型」で、総工費3000億～9000億円。高さ4000m、800階建て…っていうことは、今ある一番高いビルの7倍、本物の富士山より224mも高いという計算になりますね…
ここまで規格外なものを作るのであれば、いっそのこと日本らしく、いざというときは変形して巨大ロボになり国防に尽くす、という仕様にしてくれたらいいと思います。
Japan is a country full of crazy ideas, but their plan for the world's tallest building makes every single one of their insane USB devices look downright reasonable in comparison. It's a 13,123-foot-tall superstructure. To give you an idea of just how tall that is, it's about 7 times taller than the current tallest building on earth, and it's a solid 700 feet taller than Mt. Fuji. Yeah, it's pretty tall.

The mountain-shaped building, known as the X-Seed 4000, would be able to house upwards of 1,000,000 people and would cost somewhere between $300 billion and $900 billion to construct. Due to the size, scope, and, well, general insanity of the project, the chances of it actually being built are somewhere between slim and none. But hey, it's nice to know that at least one country out there is willing to make plans for stuff this crazy. Keep on keepin' on, Japan. — Adam Frucci

http://dvice.com/archives/2007/08/japans_plans_for_the_13000foot.php
http://www.geekologie.com/2007/08/japans_plan_for_worlds_tallest.php
http://www.inhabitat.com/2007/08/20/self-contained-tokyo-highrise-eco-city-x-seed-4000/