A nori sheet is a thin, dried sheet of edible red seaweed (Pyropia species), pressed and dried much like paper, and used mainly as the wrapper for sushi and onigiri (rice balls). Japan is the main producer, particularly the Ariake Sea and Seto Inland Sea, with significant cultivation also in China and Korea. Sheets are typically dark green to black, with a salty, umami-rich flavor and a delicate, papery texture that crisps when toasted. Beyond sushi, nori sheets are cut or crumbled into soups, stir-fries, and rice dishes, or eaten on their own, plain or seasoned, as a snack.