Two-piece set ◎ New Soroban 23 digits Wooden One-touch Abacus Banshu Craftsmanship Abacus Soroban Birch beads Soroban classroom With a dedicated hard case Ono City, Hyogo Prefecture Traditional craft Banshu Soroban High-grade birch beads How about for a soroban classroom? If you purchase this soroban, you can aim for a dan rank and you won't need to buy another one.