It depends heavily on region, but in the suburbs most Americans have room for
something that wouldn't be easily affordable in an urban Japanese home (or urban anywhere home, i suppose). Maybe a lawn or backyard, maybe a pool, maybe a garage that can fit more than one car, maybe a driveway that can fit your car while your garage is used for something else, a house big enough to have a room that you don't use every day, and so on
I personally would vastly prefer a walkable, affordable, safe, dense urban region over a lawn, a 2 car garage, and a backyard. But not everyone would agree with me, particularly for some who would say that dense and walkable is a negative rather than a positive.