"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.