Nice news for investor of bitcoin and altcoin because Japan have legal payment by using cryptocurrency and you will be more available to get much profit with bitcoin later, how ever when many country have interested with crypto will have higher price later.
Well, cryptocurrency is not only for Japan people or even the Japan people do the influence because the crypto market is global. The market price movement depend on the global economics or the global crypto influences. Anyway, at least it could create a good impact to other countries.