soumen Very thin, 1.3 mm diameter noodles served cold in the summer as a popular way to cool down. Their thinness makes them different from the thicker-cut udon noodles. Soumen that is served in hot soup is called nyumen. See alsonagashi soumenTag Group:Food Tags Aliases: noneRevision 7 by Anonymous at 2025-04-20 22:40:30.924728