デッドライン

• 読み: デッドライン
• ローマ字: deddorain
• 漢字の分解: From English 'deadline' → デッドライン (katakana transliteration)
• 発音: /ded.do.ɾa.iɴ/

意味

Deadline; the final date or time by which a task or project must be completed.

While Japanese has native terms like 締め切り and 期限, the English loanword デッドライン has become common in casual workplace conversation, especially in creative industries, IT, and startup environments. It often carries a more urgent, dramatic tone than 締め切り — the 'dead' metaphor resonates with the intensity Japanese workers feel about meeting obligations.

例文

1. デッドラインまであと3日しかないのに、まだ半分も終わってない。
2. デッドライン過ぎてるのに連絡もないって、どうなってるの？
3. このプロジェクトのデッドライン、もう少し延ばせないかな。

使い方ガイド

場面: workplace, project management, casual conversation

トーン: urgent, pressured

正しい言い方

• デッドラインいつだっけ？確認させて。 (When's the deadline again? Let me check.)
• デッドラインに間に合わないかも、相談していい？ (I might not make the deadline — can we talk about it?)

避ける言い方

• 公式文書では締め切りや期限を使う方が適切 (In official documents, use 締め切り or 期限 instead — デッドライン is too casual)

よくある間違い

• Using デッドライン in very formal writing — 締め切り or 納期 is more appropriate for official contexts
• Not understanding that in Japan, デッドライン is often treated as much more absolute than in some Western cultures

起源と歴史

Direct loanword from English 'deadline.' Adopted into Japanese workplace vocabulary as English business terminology became more common, particularly in tech and creative industries from the 2000s onward.

文化的背景

時代: 2000s onward, common in tech and creative industries

世代: All working-age adults

社会的背景: Office workers, especially in IT, design, and media

地域メモ: Used across all of Japan. More common in casual and tech-oriented workplaces than in traditional corporate settings.