～にわたって・にわたる

• Reading: にわたって
• Romaji: ni watatte
• Formation: Noun (duration/range) + にわたって + Verb / Noun (duration/range) + にわたる + Noun
• Kanji breakdown: 渡 — わたる (to cross, to span)

Meaning

A compound particle indicating that something takes place over or spans a particular extent of time, space, or range. It means 'over,' 'spanning,' or 'throughout.'

にわたって and にわたる both express that an action, state, or event extends across a broad range or duration. にわたって is used adverbially to modify a verb (something happened over a period), while にわたる modifies a noun (a span of something). The preceding element is typically a quantified time span, geographical range, number of iterations, or field of topics. It emphasizes the breadth or duration, often implying that the extent is noteworthy or impressive. It differs from 中 (during) in that にわたって highlights the full scope rather than simply placing something within a timeframe. Common in news, reports, and formal descriptions.

Examples

1. 交渉は三日間にわたって行われ、ようやく合意に達した。 Negotiations were conducted over three days, and an agreement was finally reached.
2. 台風の影響は広範囲にわたって農作物に被害をもたらした。 The typhoon's impact caused damage to crops over a wide area.
3. 彼女は十年にわたる研究の成果を一冊の論文にまとめた。 She compiled the results of ten years of research into a single thesis.

Usage Guide

Context: written, news, formal speech, reports

Tone: descriptive

Do Say

• 工事は半年にわたって続けられ、ようやく完成した。
• 長期にわたる干ばつが農業に深刻な影響を与えている。
• 会議は各部門の課題について多岐にわたって議論が行われた。

Don't Say

• 三十分にわたって散歩した。(にわたって implies a noteworthy span — thirty minutes is too trivial for this pattern) → 三十分ほど散歩した。
• この映画は二時間にわたる。(Missing a noun after にわたる — it must modify a following noun, not end the sentence) → この映画は二時間にわたる大作だ。

Origin & History

Composed of the particle に and わたって/わたる, from the verb 渡る (to cross over, to span). The image of crossing a wide expanse gave rise to the meaning of covering a broad range or duration.

Cultural Context

Generation: All ages

Social background: Universal