1.
abacus
A calculating device consisting of a frame with rods and movable beads, traditionally used for arithmetic calculations.
Usually written in kana, そろばん. Despite calculators, abacus education remains popular in Japan because it trains mental calculation.
Cultural note
The modern Japanese abacus has one bead above the bar (worth 5) and four beads below it (each worth 1) on every rod; older abacuses had five below. Many children attend after-school abacus classes (算盤塾 or 算盤教室) and take graded proficiency tests.
Related words
- 珠算: abacus arithmetic (the formal term, used in 珠算検定, the abacus proficiency test)
- 暗算: mental arithmetic, often trained by imagining the abacus
Common expressions
- そろばんをはじく: to work the abacus; figuratively, to calculate one's gains