Unused, made by Kiyoshige, high-grade one-touch soroban, birch beads, 23 digits, Tomoe This item came from my parents' home, and Kiyoshige is likely one of the highest-ranking makers within the Tomoe brand. I am also listing a boxwood soroban by the same maker, and I believe this one is of comparable quality. I believe Kiyoshige was one of the makers of Tomoe's high-grade soroban. Thank you for looking.