New Soroban 23-digit Wooden One-touch Banshu Craftsmanship Abacus Soroban Birch Beads For Soroban Classes No price reduction. Immediate purchase welcome! Comes with a dedicated hard case. Ono City, Hyogo Prefecture Traditional Craft Banshu Soroban High-Grade Birch Beads How about for a soroban class? If you purchase this soroban, you can aim for a dan rank and won't need to buy another one.