"Japan: No Bitcoin Tax, Thousands of Stores to Accept the Cryptocurrency"
article published July, 5, 2017
https://edgylabs.com/2017/07/05/japan-no-bitcoin-tax-stores-accept-cryptocurrency/"AirRegi is a widely used, tablet-based point-of-sale app in Japan. Currently, around 260,000 establishments, stores, and commercial facilities use this proprietary app to accept payments from their clients."
It makes sense that a transition to accept bitcoin would be underway for more US-based stores.
Not all the countries all over the world are knew about bitcoin. There is still some country that do not even know what bitcoin is so it will be harf for them to accept bitcoin as a mode of payment especially small retail stores.