Ishige-tsumugi is a silk fabric produced along the Kinugawa River in Ibaraki Prefecture. Like Yuki Tsumugi, it uses floss silk (mawata) as the weft, but its crisp texture resembles crepe, making it light and resistant to wrinkling. The history of weaving in this region is ancient, with records found in the Kokuhō Shōmonki (937). Originally using hemp, paper mulberry, and other fibers, weaving gradually advanced with loom improvements. In the late Meiji period, experiments with silk-cotton blends succeeded, leading to the production of Ishige-tsumugi, well-suited for summer wear. Established as a companion textile to Yuki-tsumugi, it is widely used for casual and seasonal wear in early summer and autumn. While Yuki-tsumugi is woven entirely by hand, Ishige-tsumugi incorporates semi-automatic looms, making production more efficient while retaining its refined texture.