Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/5 Beads 13 Rows ST70 shinto Small stains on the image

Small stains on the image and back

Item weight:  248 grams

It is used often in pairs to hold small cups of rice

Small stain on the front left upper part

It features openwork vine designs

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/5 Beads 13 Rows ST70 shinto Small stains on the imageJapanese Soroban Abacus Calculator Tool This is a vintage Japanese abacus or soroban. It is a mathematics calculating tool and is considered the first calculator in Japan. The Japanese abacus is different from the parent Chinese version. It has a top section of single beads and a bottom of stacked beads, usually five. At the very center is one unmarked stack used for decimal places for more complicated calculations. Many primary schools all over Japan