Unused, Kiyosei-made, Boxwood Beads, 23 Digits, Tomoe This is a popular Kiyosei abacus with Tomoe design and boxwood beads. One-touch operation is ideal for children who are learning abacus and aiming for advanced levels. While either birch or boxwood beads are fine, boxwood beads are lighter to the touch, which is why they are popular. Currently, I have one Kiyosei abacus with boxwood beads and one with birch beads that I found at my parents' house, so please feel free to take a look. Thank you for viewing.