こそ (koso) Meaning Japanese Grammar - For Sure

Author Sandro Maglione for article 'こそ (koso) Meaning Japanese Grammar - For Sure'

Sandro Maglione

こそ (koso) Meaning Japanese Grammar - For Sure

The particle こそ (koso) is used to give emphasis to the noun that precedes it, indicating that it is the main element of the sentence.

こそ in many cases replaces the particles が and を when you want to give particular importance to the marked noun, which generally corresponds to the subject of the sentence.

In this post we are going to learn more about the meaning of こそ, how it is formed, and when こそ is used through real example sentences.

How こそ is formed

こそ is an adverbial particle ((ふく)(じょ)()). To use こそ just add it after the noun you want to emphasize (similar to the particles が and を):


こそ cannot replace the particle は, since は indicates the subject of the sentence, but without adding emphasis (as opposed to が and こそ).


This time I win!

How and when to use こそ

こそ has no real translation; こそ is used to give emphasis to the preceding term and to highlight that it is the most important part of the sentence.


This is exactly what I was looking for.

In this example we see how これ (this) is followed by the particle こそ. The use of こそ allows to give a particular emphasis to the sentence, indicating that this is just or exactly what I was looking for ((さが)す).

The use of こそ adds much more emphasis than the particle が, which is used simply to indicate the subject:


This is what I was looking for.

Using こそ is similar to marking the word as bold or italics.


Today I will win!



In this other example こそ underlines the word today (今日(きょう)). This allows us to understand that probably whoever pronounces this sentence has lost all the other days, and that today is the day when he will finally win.

こそ to give emphasis and motivate

Let's see an emblematic example of the use of こそ:


We are the warriors of Tsushima, we are samurai!



In this example, taken from the video game Ghost of Tsushima, we see the use of こそ to emphasize the word we ((われ)ら). This sentence is pronounced by the general in a war to motivate the army before starting the assault. We also notice from the audio how the use of こそ adds a particular emphasis and sense of belonging, to which the army responds with fury.

からこそ: "just because"

When こそ is preceded by the particle から, the expression からこそ is formed, which translates as precisely because, precisely for this.


This expression is meant to emphasize the main reason for something, literally translated as and that's exactly why....


It's exactly because I worked hard every day that I became the best.

In the example we see how からこそ emphasizes the main reason that led the speaker to be the best ((いち)(ばん)).

In fact, the use of からこそ makes it clear that there are probably other reasons as well, but the main and most important one is exactly the one indicated.


It is precisely because you get old, precisely because you die, that makes it intolerably and intensely precious.



ばこそ: "only because"

Another expression similar to からこそ is ばこそ. This expression uses the hypothetical verb form ば followed by こそ:

Adjective in い[ば]+こそ
Adjective in な+であれば+こそ

ばこそ translates as precisely for this, only for this, and is used to give a subjective opinion on the reason that leads to a certain result.


It is precisely because there is sadness that there is also happiness.

てこそ: "only by"

The particle こそ can also follow a verb in its て form to form the expression てこそ:


てこそ indicates that the action indicated by the preceding verb is absolutely necessary for what follows to happen; てこそ can be translated as only if, if not, it is necessary that:


Only by becoming president you do understand the difficulties of taking on this role.

The てこそ form in a Japanese publication:

Things that can only be learned with age
(とし)(かさ)ねる: become older, grow older; literally accumulate years


Things that can only be learned with age

In the same publication the からこそ form:

Because it's hard, I'll try to live a little longer.
(くる)しい is an adjective meaning painful, hard, difficult


Because it's hard, I'll try to live a little longer.

こそ in an expression of gratitude

The particle こそ is commonly used in a form of (かん)(しゃ) polite and formal gratitude.



Thank you very much for today.



The pleasure was mine, thank you.

In this expression こちら replaces わたし in meaning, but in the form わたしこそ is not used.

In other cases that do not concern the form of gratitude, わたしこそ can be used, for example:



Sorry about the other day ...



I was the one who was sorry.

Examples of こそ


Precisely because I'm busy, I want to value the time with my family.


I love this park because it is quiet.


This is exactly what we need.