Comment by BenFranklin100

Tokyo is not a free-for-all. It does zone for different uses by forbidding certain uses above a certain nuisance or hazard level. For instance, in many areas you can’t just plop down a chemical factory. The cool thing about Tokyo zoning though is that anything below a nuisance level is pretty much allowed. Want to build a house next to a dump or above a discotheque? Go for it, no one is going to stop you.