単位で (たんいで)

• Reading: たんいで
• Romaji: tan'i de
• Formation: Noun (unit/group) + 単位で / Number + 単位で + Verb
• Kanji breakdown: 単 (single) + 位 (rank, position)

Meaning

A phrase meaning 'in units of' or 'by the [unit],' indicating the smallest increment, scale, or grouping by which something is measured, counted, or handled.

単位で specifies the unit or scale at which an action or measurement takes place. 月単位で means 'on a monthly basis,' 個人単位で means 'on an individual basis,' and 億単位で means 'in the hundreds of millions.' It is used to clarify granularity: how finely or broadly something is divided, counted, or managed. The expression is common in business, administrative, scientific, and statistical contexts. It can also express surprisingly large or small scales: 兆単位の損失 (losses in the trillions). Unlike ～ごとに, which emphasizes repetition at each interval, 単位で focuses on the size of the unit used for measurement or action.

Examples

1. このプロジェクトは週単位で進捗を報告する必要がある。 This project requires progress reports on a weekly basis.
2. 被害額は億単位に上ると推定されている。 The damage is estimated to amount to hundreds of millions of yen.
3. 国単位ではなく地域単位で対策を講じるべきだ。 Countermeasures should be implemented on a regional basis, not a national one.

Usage Guide

Context: spoken, written, business, academic

Tone: precise

Do Say

• 人件費は年単位で見直される仕組みになっている。
• 研究データはミリ秒単位で記録されている。
• 部署単位で予算を管理するよう指示が出た。

Don't Say

• 月の単位で報告する。(Inserting の between the noun and 単位 — the compound is direct) → 月単位で報告する。
• 単位で月に報告する。(Placing 単位で before the unit noun) → 月単位で報告する。

Origin & History

単位 is a Sino-Japanese compound from 単 (single) and 位 (rank/position), literally meaning 'a single position on a scale.' The modern usage as 'unit of measurement' became standard during the Meiji era with the adoption of Western scientific terminology.

Cultural Context

Generation: All ages

Social background: Universal