And as HasHe mentioned above, the fees concern is still not solved. Countries can be as friendly as ever towards Bitcoin but if it costs too much to make a transaction, only criminal organizations will keep being interested to hold some for high amounts payments.
Exactly, BTC fees are the issue for Bitcoin broader acceptance at this point.
But transactions fees are very low with NEM and MONA so these coins may be more easily accepted by Japanese merchants throughout 2018.