The demand for sourcing is a bit unrealistic when you can just go to Den'enchōfu and see for yourself. Well, chances are that you can't but as it happens I can (which means nothing) and thousands of others can too (which does mean something). I do have serious reservations about this article as it was before the latest addition/deletion/reinsertion: it seems to me to recycle stereotypes about Den'enchōfu that are only partly true. (Also, I'm pretty sure that at least one of the photos isn't of Den'enchōfu, and the others are uninformative.)