That would be quite the engineering feat and an architectural marvel. If anyone can pull it off, I suspect the Japanese can. It’s good that they’re dreaming and reaching. Several questions arise, though. Their population is declining, so where is the demand? Hurricane force winds won’t be uncommon at the top of this structure. Power failure would be much more of a problem, can you imagine 55,000 people exiting this building via stairs? Fire, I don’t even want to think about that.