Japan still remains as the largest bitcoin exchange market with over 51 percent of the market share, analysts stated that the crackdown on small exchanges have had an impact on the global cryptocurrency market
Yes, you are right. Japan is one of the leading countries in adopting bitcoin in the country. a progress that should be imitated by other nations. it's just a matter of time waiting for bitcoin to be the main alternative payment tool in the world, accompanying the major currencies of the world as a means of payment received by all parties.
But if you want to know the country that still prohibits bitcoin in the country you can find out the information in this link.
https://www.ccn.com/top-10-countries-bitcoin-banned/kind regards.
Japan is a country that is very open to digital currency, it's all not strange because Japan became one of the countries that have high technology. Japan could be a pioneer of Bitcoin use globally, they can do the implementation and show it to all other countries. Yes we are only waiting for time until finally Bitcoin can be used normally and no country that prohibits the use of Bitcoin. This requires a process and one way we can do to support the development of Bitcoin is to continuously use Bitcoin in every day financial transactions.