The Japanese abacus consists of a rectangular wooden frame having a crosspiece running lengthwise slightly below the upper edge of the frame. Evenly spaced thin bamboo rods run vertically from the upper edge of the frame to the lower, passing through small holes in the crosspiece. Each of the rods carries beads, a single bead above the crosspiece which counts as five, and four beads below the crosspiece, each counting as one."NIPO-319", "2467552"