Do people actually do this?
Because I don't at all. My perennial daycare dreams don't happen in the real places they do (did) happen in. Best I can get is reality+, so it's our old daycare yes, and the same staff, but now it's in the basement level of a supermarket highrise. The 'going back to Bedford' dreams may have the real Bedford house, but the circumstances have changed (they'd have to, for me to be there at all)-- we sold it but we're allowed to go on living there, we sold it but I manage to get in by a window. It's never an actual event that happened at Bedford.
And Japan dreams manufacture their own reality. I often dream of Heiwadai, but it's a flat plain with a road that goes on forever between sparse buildings, about five subway stops to get anywhere. A look at google maps shows how very much not true that is.