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Second-generation president of Tomoe Soroban, Fujimoto Tomoe, left her job as an English teacher to head the company.
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The 100-bead abacus provides a simple and fun way to learn how to count.
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The firm offers its booklet explaining how to use an abacus in English and five other languages, including Esperanto.
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Students at New York charter school Harlem Village Academies using the 100-bead abacus in class in 2014. (Courtesy Tomoe Soroban)
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Students studying Japanese at a high school in Denmark practice the abacus during a workshop in 2013. (Courtesy Tomoe Soroban)
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Tomoe Soroban makes its abacuses at its factory in Ono in Hyōgo Prefecture with beads crafted from an especially hard variety of birch and hand-assembles into rows on bamboo dowels.