According to the information, the plan of Japan is to attract international investors the maximum freedom to use crypto currency, while the rest of the world is trying to limit it. Japan is interested in controlling the crypto currency, and not in its prohibition.
That will be a good thing especially those countries in which most of their population is using bitcoin. Instead of banning it from their country why not find another way just like what japan is trying to implement. Japan has always been the leading when it comes to technology and it is not new that they are the first country that is making use of this new technology which is the blockchain.