There's been a little discussion in the UseNet conference sci.space.policy about the statements by the two Japanese construction giants about building in outer space. They are not realistic. From what I have heard, these are mainly done by the Japanese firms for internal promotion purposes. Then you spend the rest of your career designing innovative parking garages for downtown Tokyo.
Japan is a little different.
In US big business, if you think five years ahead you're a long-term planner, and if you think ten years ahead you're a visionary. But big Japanese companies think much farther ahead, and their long-term plans go decades ahead. Understand, we are talking about a slightly different approach to things here. But they do exist. Not as detailed roadmaps of everything the company is going to do, but as general ideas of which way it will probably be heading and what preparations need to be made.