Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 13 Rows ST68 kiku Porcelain ball

Porcelain ball

and plum blossom (Shōchikubai) design in the center with a Japanese flag and cherry blossoms

8 cm tall

Cards have some stains and blemishes

Fold marks on the top corners and top edge

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 13 Rows ST68 kiku Porcelain ballJapanese 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