But in this case truly im wondering how things could go on bitcoins economy after the mass acceptance of japan citizens. Maybe it has a great effect truly but i cannot see some good odds upon predicting an higher price of it.
Is there really going to be mass adoption of bitcoin by japanese citizens? What we have seen over and over is that even if you make bitcoin available for people to use, they just don't bother.
See Overstock enabling bitcoin and thinking this would help them gain ground over amazon. What happened is that a few enthusiasts used the function, and then forgot about it and went back to using dollars.
I predict the Japanese will stubbornly continue to use yen and ignore the bitcoin facilities.
The only time people switch to bitcoin is when there are capital controls (eg under Argentina's old govt - when they abolished capital controls, people went back to using the normal currency).