Igusa kogeihin (rush crafts) are crafts from Yatsushiro City in Kumamoto Prefecture, known as the number-one rush producing area in Japan. It is said that its origin is around 500 years ago when Tadahisa Iwasakishume acted as the castle lord of Agetsuchi Castle and encouraged the cultivation of rush in the territory. In addition to tatami mats and rugs, rush crafts include cushions, slippers, and slit curtain made by knitting them with rush ropes.