Kumagai Coffee

you're looking at a self-roasting shop in saitama with a location close to omiya station, which makes it genuinely convenient if you're passing through on the shinkansen. kumagai coffee focuses on single-origin beans and roasts in-house, so what you buy off the shelf is their own work, not someone else's. the research is a little thin on specifics like founding year or signature origins, but the setup, roasting their own, selling beans directly, multiple locations, points clearly toward a real specialty operation.