Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 23 Rows ST74 Kutani yaki This cup is a textured

This cup is a textured pale blue with a white design

Item weight: 454 grams

a slop bowl for used water (kensui)

The picture on the top of the glass negative shows four Japanese women wearing Western-style clothing posing outside in front of a tree and with a river and a mountain in the background

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 23 Rows ST74 Kutani yaki This cup is a texturedJapanese 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 center is one unmarked stack used for decimal places for more complicated calculations. Many primary schools all over Japan