Yamamoto Soroban Store in Asakusa - One-Touch Soroban, Birch Beads Brand name: Super Touch I wonder if this brand name is still in use today. The 19-digit soroban with Iwatsuge (rock boxwood) beads that I used for 60 years, made by Takeyoshi Wakatsuki, was purchased from Yamamoto Soroban. This item has been stored unused for a long time. There are no problems with its use. Thank you for looking.