This is a shortlist of independent coffee roasters and coffee shops in central Naha (accessible on the Yu-Rail). As an amateur coffee enthusiast and digital nomad, I factor locations for coffee quality, remote work suitability, and the subjective impression of how friendly the service staff or owners are. In Naha, I used a pocket wifi to have access anywhere, and I would recommend the same approach for other visitors.
Remote work cafes in East London around the Old Street, Spitalfields, Brick Lane, Liverpool Street, Aldgate, and Whitechaple areas. Some have WiFi.