Which country pioneered the concept of 'unmanned retail stores' where customers shop in physical stores without any staff present, using only technology for entry, shopping, and payment?

In today's interconnected world, retail innovations often emerge from specific geographic regions before spreading globally. Some locations have become famous for pioneering particular approaches to retail that reflect their cultural values, technological infrastructure, or consumer preferences. Test your knowledge about how geography influences retail innovation and which regions have made significant contributions to changing how we shop and experience brands worldwide.

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China
Sweden
Japan
South Korea