〜こそ / 〜だからこそ — JLPT N2 Grammar
Learn 〜こそ and 〜だからこそ to place emphatic focus on a specific element — 'it is precisely X' and 'precisely because of X.'
Pattern
〜こそ / 〜だからこそ / 〜てこそ (koso / da kara koso / te koso)
Structure
- Noun + こそ (emphatic focus on noun)
- Verb (て-form) + こそ (only by doing X can Y be achieved)
- 〜だからこそ (precisely because of this/that reason)
- 〜からこそ (precisely because — attaches to various forms)
Formality Level
All registers — こそ appears in casual speech, formal writing, official speeches. More emphatic uses tend toward formal/written.
Meaning
〜こそ: Places strong exclusive emphasis on the marked element. Means "it is precisely X," "X above all," "X is the very thing." Implies that X — and not other factors — is the most important or defining element.
〜てこそ: "Only when/by doing X can Y truly be achieved." Emphasizes that Y requires X as a necessary and sufficient condition.
〜だからこそ: "Precisely because of this reason, X." Emphasizes that the given reason is the decisive, specific factor behind a conclusion.
Examples
| Japanese | Reading | Romaji | English |
|---|---|---|---|
| 今こそ、行動を起こす時だ。 | いまこそ、こうどうをおこすときだ。 | ima koso, kōdō o okosu toki da. | Now is precisely the time to take action. |
| 彼の努力こそが、成功の鍵だった。 | かれのどりょくこそが、せいこうのかぎだった。 | kare no doryoku koso ga, seikō no kagi datta. | It was precisely his effort that was the key to success. |
| 失敗してこそ、人は本当に成長する。 | しっぱいしてこそ、ひとはほんとうにせいちょうする。 | shippai shite koso, hito wa hontō ni seichō suru. | Only through failure does a person truly grow. |
| 困難だからこそ、挑戦する価値がある。 | こんなんだからこそ、ちょうせんするかちがある。 | konnan da kara koso, chōsen suru kachi ga aru. | Precisely because it is difficult, it is worth challenging. |
| 信頼関係こそ、チームワークの基盤である。 | しんらいかんけいこそ、チームワークのきばんである。 | shinrai kankei koso, chīmuwāku no kiban de aru. | A relationship of trust is precisely the foundation of teamwork. |
Comparison with Other Emphasis Patterns
| Pattern | Type | Example |
|---|---|---|
| 〜こそ | Exclusive focus | 今こそ (now is THE time) |
| 〜さえ | Extreme case ("even X") | 今さえ行けば (even now, if you go) |
| 〜でも | Inclusive ("even X") | 今でも間に合う (even now, it is in time) |
| 〜が | Subject focus marker | 彼が行った (HE [not someone else] went) |
こそ vs さえ:
- こそ = "precisely X" (positive, defining focus)
- さえ = "even X" (surprising inclusion, usually the minimum or extreme case)
Example: 今こそ行くべきだ = "NOW is precisely when you should go" (affirmative emphasis) 今さえ行けば間に合う = "If you go even NOW (at this last chance), you can make it" (extreme case)
Common Mistakes
- ❌ 彼こそは行きます → こそ and は do not combine in standard modern Japanese. Use: 彼こそ行くべきだ.
- ❌ だからこそのに → こそ and のに conflict logically; do not combine.
- ✓ これこそが問題の核心だ → correct emphatic focus structure.