一いち玉だま

noun

soroban bead with value one

Refers to a single bead on a soroban (Japanese abacus) that represents the value 1. Used in abacus instruction and calculation contexts.

See also: そろばん

• そろばんの一いち玉だまをはじく練れん習しゅうをする。

  Practice flicking the one-bead on the soroban.