こそ
こそ
particle
emphasis particle (it is precisely...)
1.
emphasis: it is precisely, it is ~ that
Adds strong emphasis to the preceding word or phrase, singling it out as the most important or relevant element. Often translatable as 'it is precisely ~ that' or left untranslated with emphasis.
こちらこそ、よろしくお願いします。
It's I who should be asking — pleased to meet you too.
こちらこそ is a fixed expression used to return a greeting or thanks.
今度こそ合格したい。
This time, I really want to pass.
努力したからこそ、成功できたのだ。
It was precisely because I worked hard that I was able to succeed.
からこそ emphasizes the reason: 'precisely because.'
こそ is an emphasis particle that singles out the preceding word as the key element. It replaces は or が in the sentence.
COMMON PATTERNS:
- こちらこそ: It is I who should (say that) — used to return thanks, apologies, or greetings
- 今度こそ: this time for sure
- からこそ: precisely because
- てこそ: only by doing ~ (can one...)
- ～こそ～が: although ~ is true, (something contrasting)
CONTRAST WITH は AND が:
- は marks the topic neutrally
- が marks the subject (often new information)
- こそ highlights the word with strong emphasis, singling it out
NOTE: こそ replaces は or が; it does not stack with them. You say 彼こそ, not 彼がこそ or 彼はこそ.