New Soroban 23-digit Wooden One-touch Abacus Banshu Craftsmanship Soroban Kaba Beads Soroban Classroom No discounts. Immediate purchase welcome! Comes with a dedicated hard case. Ono City, Hyogo Prefecture Traditional Craft Banshu Soroban High-grade Kaba Beads Perfect for soroban classrooms! If you purchase this soroban, you can aim for a dan rank and won't need to buy another one.