N2 · Expressions (N2)
からこそ: precisely because
the reason that matters most
Put a reason in the spotlight: this, and nothing else, is why.
こそ puts the spotlight on the word in front of it, and on から it lights up a reason: 好きだからこそ厳しく言う, "it is precisely because I care that I speak harshly". The phrase follows the plain form, and a noun or a na-adjective takes だ: 家族だからこそ, 大切だからこそ.
It earns its place when the reason is surprising, or runs against the obvious reading. Harsh words usually mean dislike; with からこそ the speaker insists that they mean the opposite. The sentence often ends in のだ or んです, which marks it as an explanation: …からこそ、頑張れたのだ.
Only から can take こそ; ので cannot. ので presents a reason as quiet background, and background cannot be put in the spotlight. At the start of a sentence, だからこそ points back at what has just been said: "and that is exactly why".
English speakers tend to use it as a strong "because". An ordinary cause — I was hungry, so I ate — needs no spotlight, and adding one makes the sentence sound as if it were answering an objection nobody raised.
The form
| after a verb | 努力したからこそ |
| after an i-adjective | 難しいからこそ |
| after a na-adjective | 大切だからこそ |
| after a noun | 家族だからこそ |
| opening a sentence | だからこそ、… |
| with an explanation at the end | …からこそ、…のだ |
The rules one by one
からこそ follows the plain form; a noun or a na-adjective takes だ.
友達だからこそ、本当のことを言うんです。It is because you are my friend that I am telling you the truth.
Use it when the reason is unexpected or needs to be insisted on.
失敗したからこそ、学べたこともある。There are things I learned precisely because I failed.
こそ goes with から, never with ので.
忙しいからこそ、休みが大切だ。It is precisely when you are busy that rest matters.
だからこそ at the start of a sentence means "that is exactly why".
時間は限られている。だからこそ、計画が必要なのだ。Time is limited. That is exactly why a plan is needed.
A closer look
The spotlight particle
こそ is not tied to reasons. After any noun it says "this one, and no other": 今年こそ合格したい, "this year I really want to pass" — after other years when you did not. からこそ is the same particle aimed at a reason.
Because こそ singles something out against expectations, it belongs to statements, not to background. That is the real reason ので rejects it: ので exists to make a reason sound obvious and uncontested, and a spotlight on something uncontested has nothing to show.
How to spot it
- からこそ
- だからこそ
- からこそ…のだ
Example sentences
親は子どもを愛しているからこそ、叱るのだ。Parents scold their children precisely because they love them.
みんなの協力があったからこそ、成功できました。We succeeded only because everyone pulled together.
苦しい時期があったからこそ、今の幸せが分かる。It is because I went through hard times that I can appreciate how lucky I am now.
難しいからこそ、やってみる価値がある。It is worth trying precisely because it is difficult.
小さな会社だからこそ、できることもある。There are things you can do precisely because you are a small company.
信頼しているからこそ、この仕事を任せたんです。I gave you this job because I trust you — that is the whole reason.
7 more example sentences
本気だったからこそ、彼は怒ったのだと思う。I think he got angry precisely because he was serious about it.
経験が少ないからこそ、若い人の意見は新鮮だ。Young people's views are fresh precisely because they have little experience.
毎日続けたからこそ、ここまで上手になったのだ。It was keeping at it every day that made you this good.
大切な話だからこそ、直接会って話したい。Because it matters, I want to tell you in person.
田舎だからこそ味わえる楽しみがある。There are pleasures you can only have because it is the countryside.
失敗を恐れないからこそ、彼は新しいことに挑戦できる。He can take on new things precisely because he is not afraid of failing.
言葉が通じないからこそ、笑顔が大事になる。Precisely because you cannot understand each other, a smile matters.
Worth knowing (1)
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こちらこそ, the everyday こそ
The こそ every learner meets first is in こちらこそ, the reply to a thank-you or a greeting: "no, it is I who should say that". It is the same spotlight — this side, not yours — and it shows how naturally こそ turns an expectation round.
こちらこそ、よろしくお願いします。Likewise — I look forward to working with you too.
The trap English speakers fall into
Watch out
Both ので and から translate as "because", so it seems natural to put こそ on either. But ので presents a reason as neutral background, the opposite of what こそ does. Only から can be highlighted, and a na-adjective before it takes だ.
こそ goes on から, never on ので — and only when the reason needs a spotlight.
Your turn
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