"Good fences make good neighbors." Which means -- if we extrapolate this bit of Robert Frost wisdom a little further -- Japan should have some of the best neighbors in the world.
For it certainly has some of the best fences.
In fact, arriving from a prairie town of rolling lawns and open driveways, the first feature of Japanese life that crept into my soul and made me feel "Nope, I'm not in Kansas anymore" was the "wall" that surrounded nearly each and every house.