I think it is because of the threat that poses it on the bank but Japan is looking on the positive side instead despite of the negative comments of the other countries and their competitor. I think it's time for the other countries to accept the legality of crypto currency in a different way if they had a problem with it, they should follow what Japan's been doing.
Japan has made its regulatory framework operate in such a way, that it is heavily focused on squeezing every penny out of people's pockets with their taxation laws. On top of that, the somewhat initial friendly crypro regulations of Japan are becoming more closed with every month that goes by. Other countries will definitely follow, but you have to understand that where Asian countries have Japan as main example, European or North American countries don't have that. I am quite sure that they are waiting for one country in their continent to set the first step, where after that the rest will follow. It will take time but eventually it will happen.