japan could be possibly to ban ico like korea because if the japan government can see that there is so many ico that don't have a good plan for the ico and japan can protect their citizen from getting scam, they can do this with easy. but i don't think bitcoin and other cryptos will gets the bad impact because i think its different between the ico and the bitcoin especially if we talk about crypto currency. the ico is like a project that is not yet run properly and they need to test the project by doing many things like attracted the investor, make promotion, release the coins and other things.