In Bleach there is a western branch of souls society as well as eastern, which is the main one. Logically thinking, there should also be northern and southern branches. BUTT! That's not the main issue. If the Japanese die, they get sent to eastern soul society, unless they get eaten by hollows or become them. What in that case happens to the rest of the world? For example, where do people in Germany or America go after they die? What about middle east or other parts of the world? Do they have their own after life realm? Same for similar places like hell and hollow realm? Did Kubo hint at something at some point?