Japan made bitcoin a legal currency - now it's more popular than ever.
Bitcoin trade in Japan accounts for about half of the global trade volume. Compare that to 25 percent in US.
That number has surged since the government passed a new law earlier this year, recognizing Bitcoin as a legal form of payment.
That law encouraged some big retailers to partner with Bitcoin exchanges and begin accepting the digital currency.
There's already more than 4,500 stores that let you pay with Bitcoin here, and the Nikkei says that number could increase five-fold by the end of the year.