This particular story, though, takes as its central point the concept of the "poor aunt," which sounds like a thing that any Japanese person would be able to recognize as a type, but not necessarily anyone here. He is evoking a very specific set of traits that tease the outside edges of my understanding. There is enough in the story to make it tantalizing, and yet I feel that I am left without the facility to grasp its essence. I don't have any internal concept of "poor aunt," so I can only extrapolate from the clues given in the story.
I wish I could write that poetically. I can't think, off the top of my head, of any American writers that do. It's a layering of surreality on top of the mundane. Anyone who has a chance to should check the story out. It's brilliant.