Here I refer to "banning" Bitcoin in these countries. It's my assumption only so please don't throw stones at me. I come to think that they aren't so much against Bitcoin itself, and they don't mean anything evil towards it. All they do basically comes down to preventing their population from being too much obsessed with Bitcoin because these nations are known as quite venturous. The authorities simply don't want to deal with the crowds of angry people after they lose their savings at Bitcoin exchanges, which look more like Bitcoin casinos nowadays.

Japan is definitely different in this regard. They have a culture that celebrates moderation and composure. That may be one of the reasons why Bitcoin has got so much public as well as government recognition there.