Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 13 Rows ST52 Hako Iron Chagama

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 13 Rows ST52 Hako Iron ChagamaJapanese 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

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