Even more advanced countries such as Russia, Japan, Australia and Venezuela have attempted to legally sell Bitcoin.
Russia is a dismal country where the government wants to control everything and as far as I know the Russian government is not friendly when it comes to bitcoin, so putting japan on the same side as russia is something you can't do because japan is more Bitcoin friendly to russia
But it is interesting to note that some countries, such as India and the United States, have not yet taken action in this regard and have not yet defined an official policy on such currencies.
India is not bitcoin friendly, while the US despite having no bitcoin laws they are bitcoin neutral which allows its citizens to buy and sell bitcoin as they please