After the mash, known as "moromi," has finished fermenting, it is pressed by this machine which filters it, resulting in sake. The yellow curtain-like thing inside the machine is made of panels of fabric that alternate moromi and air. As the panels fill up with air and moromi respectively, the curtain expands. Then, to separate the liquid sake from the sake lees, the blue block on the right moves inward to add pressure, essentially "ringing out" the moromi-filled curtain.