さえ・
Choosing a focus or extreme-example expression
First decide what the emphasis is doing. Use さえ for an extreme example, まで when a range reaches surprisingly far, and こそ to identify precisely the important or correct choice. てこそ makes an action essential to a result. すら is a formal counterpart to ordinary “even,” while だに belongs mainly to established literary expressions about thinking, hearing, imagining, or remembering.
Choose by the job of the emphasis
All six forms highlight something, but they do not highlight it in the same way.
An extreme example
さえ
One unlikely, easy, difficult, or impressive case shows that the statement applies more broadly.
The context must make the marked case genuinely extreme.
A range that reaches surprisingly far
まで
People, effects, information, or consequences extend all the way to an unexpected endpoint.
An ordinary destination or endpoint does not mean “even.”
The precise or decisive choice
こそ
You are correcting an assumption or strongly affirming that one person, thing, time, or reason truly matters.
An indispensable action
てこそ
Doing or experiencing the first action is what makes the following result possible or meaningful.
It is stronger than merely saying that one event happened before another.
A formal extreme example
すら
You need the extreme-example meaning in formal prose, a report, an essay, or deliberate rhetoric.
It usually sounds too elevated as the default choice in casual conversation.
A literary minimal thought or perception
だに
Merely thinking, hearing, imagining, or remembering is enough to cause a strong reaction, or even that minimal mental act never occurred.
This is a restricted literary form, not a freely usable replacement for ordinary “even.”
An extreme case or surprising reach?
Confidential information has gone beyond where it was expected to remain.
その機密情報は、担当部長さえ知らなかった。
Even the department head in charge did not know the confidential information.
AnalyzeThe department head is the person most expected to know. This extreme failure suggests that people below that level did not know either.
その機密情報が、海外の競合会社にまで漏れた。
The confidential information leaked even as far as an overseas competitor.
AnalyzeThe emphasis is on how far the leak spread, with the competitor as its alarming outer reach.
Takeaway: さえ asks, “What extreme example proves the point?” まで asks, “How far did the affected range extend?”
Strongly choosing one alternative
こそ does not mean “even.” It strongly affirms the marked item as the correct, important, or decisive one. A correction, competing expectation, or clear alternative normally makes the emphasis natural.
経験の長さではなく、判断の正確さこそ重要だ。
What matters is precisely the accuracy of the judgment, not the length of experience.
AnalyzeWhen an action makes the result possible
With a verb in the て-form, こそ presents that action as the indispensable route to the result. It often sounds like a principle, conviction, or lesson—not a neutral report of sequence.
失敗の原因を認めてこそ、改善への一歩を踏み出せる。
Only by acknowledging the cause of the failure can we take a step toward improvement.
AnalyzeRegister matters
Swipe sideways to compare every column.
| Form | Natural settings | Practical guidance |
|---|---|---|
| さえ and focus まで | Ordinary conversation and writing | These are the normal productive choices for an extreme example or surprising reach. |
| こそ and てこそ | Speech and writing, especially corrections, speeches, advice, and statements of principle | Grammatically neutral, but rhetorically strong. |
| すら | Reports, essays, formal writing, and deliberate rhetoric | Productive, but noticeably more elevated than the everyday alternative. |
| だに | Literary narration, formal prose, fixed expressions, and deliberately dramatic speech | Highly marked and limited to established combinations. |
Formal and literary choices in context
The following sentences suit formal or literary prose. They would sound unusually elevated in relaxed everyday conversation.
調査報告書には、基本的な集計結果すら示されていない。
The investigation report does not show even the basic tabulated results.
AnalyzeThe formal form highlights a minimum that a proper report would normally be expected to include.
その事故の光景は、思い出すだに胸が苦しくなる。
Merely recalling the scene of that accident makes my heart ache.
AnalyzeThe smallest mental contact—simply recalling it—is enough to trigger a strong reaction.
More examples across the family
普段は無口な佐藤さんさえ、その話には笑った。
Even Mr. Sato, who is usually quiet, laughed at that story.
Analyze停電で、短い連絡さえ送れなかった。
Because of the power outage, I could not send even a short message.
Analyze大雨の水が、地下の倉庫にまで入り込んだ。
The rainwater got even as far as the underground storeroom.
Analyze次の一週間こそ、計画の成否を決める。
The coming week is precisely what will determine the plan's success or failure.
Analyze毎日続けてこそ、練習の効果が現れる。
Only by continuing every day will the practice produce results.
Analyze提出された申請書には、責任者の署名すらなかった。
The submitted application did not even have the responsible official's signature.
Analyze被害の全容は、聞くだに恐ろしい。
The full extent of the damage is terrifying merely to hear about.
Analyzeその国を離れる日が来るとは、彼は想像だにしなかった。
He had never even imagined that the day would come when he would leave that country.
Analyze