Which cryptocurrency is used in Japan?
Could you please elaborate on the cryptocurrency that is predominantly used in Japan? I'm particularly interested in knowing which one enjoys the most popularity and widespread acceptance among the Japanese population. Additionally, I would like to understand the reasons behind its popularity and the extent to which it is integrated into daily transactions and business dealings in Japan. Is there any specific regulation or policy that supports its usage? Finally, how does it compare to other cryptocurrencies in terms of adoption and usage in Japan?