Taisei Construction Corporation has designed a 13,000 ft, Star Wars-esque structure for possible development in Tokyo. The 6-square kilometer building would house anywhere from 500,000 to one million residents, follow contemporary green planning outlines, and would incorporate the means to protect its residents from the weather/air pressure conditions common to such high elevations. Of course, as one snarky Inhabitat reader points out, “Japan has a wonderful history of designing architectural vapourware,” and that much like “… all Japanese supertall proposals, this… will never be built.” That sentiment comes at somewhat of a relief, because the thought of spending 300-900 billion to build an enormous anthill sounds kind of creepy to me, but either way, the X-Seed 4000 demonstrates an interesting form of development, and certainly serves as a thought-provoking, futuristic concept of where time may take us.