~となる (to become / to turn into)
Meaning
A phrase expressing that someone or something becomes something or reaches a certain state. It is a more formal and emphatic variant of になる, often used in written language and official announcements.
となる functions similarly to になる but carries a stronger sense of formality, finality, or significance. It is preferred in news reports, academic writing, legal documents, and formal speeches. While になる can describe casual everyday changes, となる implies that the change is noteworthy, definitive, or has broad implications. It often appears with nouns and な-adjectives. In spoken language, となる sounds stiff and is mostly reserved for serious or ceremonial contexts.
Examples
- この法律は来年四月から有効となる。 This law will become effective starting April of next year.
- 長年の研究がようやく成果となって現れた。 Years of research have finally manifested as results.
- 彼女は今回の事件で重要な証人となった。 She became an important witness in this incident.
Usage Guide
Context: written, news, academic, formal speeches
Tone: authoritative
Do Say
- 今回の発見は医学の歴史において重要な転換点となるだろう。
- 彼の証言が裁判で決定的な証拠となった。
- この地域は近年、観光の中心地となっている。
Don't Say
- 明日は雨となる。(Overly formal for a casual weather comment; になる is natural in everyday speech) → 明日は雨になる。
- 彼は先生となりたい。(となる describes objective outcomes, not personal wishes; になりたい is correct) → 彼は先生になりたい。
- 部屋がきれいとなった。(For い-adjective-like changes in state, になる is standard; となる pairs with nouns and な-adjectives) → 部屋がきれいになった。
Origin & History
と is the quotative/resultative particle marking the end state, combined with なる (to become). This construction highlights the specific outcome or role that something assumes, lending a formal or literary register.
Cultural Context
Generation: All ages
Social background: Universal
Related Phrases
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