unmanned store; automated shop
A retail store that operates without on-site staff, often using self-checkout or vending-machine technology.
Recently, unmanned stores have been increasing in front of the station.
This automated shop is open 24 hours and only accepts cashless payments.
Compound of 無人 (むじん, 'unmanned') and 店 (てん, 'shop'). The exact historical derivation is straightforward; the term is a modern coinage reflecting the concept of staffless retail.