I read different books and anyone has a different explanation.
Some of them say:

It does not have a gramamar role and native speakers only know that something about that is going to be said after it. The real grammar role is done by the 0 pronoun.

It is the subject and sometimes it can become the object.

It is what you are going to comment about and it has no grammar role.

So, I still struggle with this.
I think I somehow understand when to use が or when to use は, but I have trouble when I find it in long sentences or in the middle of them.

I understand why it cannot be used in a relative clause, and it makes sense to me, but when I find it in the middle or at the beginning of a long sentence I am not sure how to look at it and I get confused.

In some books I found sentences like:

私は[町に行く]人々に会った。 So it is part of the sentence.
[私は][町に行く人々に会った] So は is not part of the sentence.

Somewhere I read that I should simply look at what is marked by は as if it were connected to the main verb (so the last verb in the sentence).
Is this correct?

Which is the correct explanation?

  • 1
    (I'll prob. delete this comment within a day or two.) ______ basically, i'm unable to understand your question. ___________ 私は町に行く人々に会った is not ambiguous, ... it can only be parsed one way. (do you see 2 meanings? if so, what are they?) _______ i'd mark the parsing as : (私は) ( 町に行く人々に ) 会った ________ which is partly based on this set of rules : japanese.stackexchange.com/questions/38679/…
    – HizHa
    Sep 17, 2016 at 2:24
  • Yes that is not ambiguous. With the two parenteses in the second example it's as if は (the first parenthesis) is not part of the rest of the sentence (the second parenthesis) . は has bo grannar role in the sense that it does not fit in a sentence, it is kind of separated.
    – Splikie
    Sep 17, 2016 at 6:14

2 Answers 2


This article might help you: http://www.nkc.u-tokyo.ac.jp/study_info/study_info01_04_j.html

I believe は has a grammatical role, as it can make a subject or an object, you know.

Somewhere I read that I should simply look at what is marked by は as if it were connected to the main verb (so the last verb in the sentence).

I think this is almost correct, because a topic is what you really want to focus in a sentence and it is often said by the main verb of a whole sentence.

So when you find は at the beginning of a long sentence, mark it as the topic. Its grammatical role (subject/object) is determined by checking the rest of the sentence. Examples:


Japan is the country where my son who married last year is living.

In the above sentence, the topic is Japan. So the speaker's intent is to tell listeners additional information about Japan rather than information about his son.

Grammatically, the rest of the sentence [去年結婚した私の息子が住んでいる国だ] is a verb phrase ([去年結婚した私の息子が住んでいる] modifies [国だ]) and it does not require an object, so Japan becomes a subject.


Mr. Yamada teaches mathematics.

In this example, the topic is mathematics. So the interest of listeners is who teaches mathematics, not what Mr. Yamada does.

Grammatically this は makes an object since the verb phrase [山田先生が教えている] needs an object.

Note that the case exists that は is neither a subject nor an object:


Elephants have a long trunk.

In the above sentence, the verb is [長い]. It doesn't take an object, so [象は] is not an object. [象は] is neither a subject because if [象は] was a subject, the meaning would be like "Elephants are long."

There is a discussion among Japanese about this kind of sentences. 三上章 (Mikami Akira) persists that it has no subject.

Next, if you find find は at the middle of sentence, it can usually be moved to the top of sentence without changing its meaning unless it is contained in a relative clause. So you shouldn't be so scared; it is just indicating a topic too.


The rapid advancement of artificial intelligence has made Shogi what the human cannot reach.

The topic of this sentence is Shogi, which is a subject here. Its meaning the same as [将棋は目まぐるしい人工知能の進歩により人間の手が届かないものになってしまった。], tough the former is a bit more natural to me.

Hope my answer is your help.

Edit (in response to the first comment)

what if I find first a には、では、とは or even にとっては、に対しては、によっては、 and after that a normal は?

You know, は has major two meanings: one is a topic maker we are discussing here, and the other is a contrastive particle.

If you find two は-s in one sentence, it is unlikely that more than one は-s are topic makers. This is because it is quite unnatural that a sentence has more than one topics.


Actually, the sentence in question can be omitted.

In this sentence, the first は in には is for contrast; the writer says that "Actually the sentence can be omitted though it isn't here." the second は is a topic maker.

I think particle+は is very much likely to be contrast rather than a topic. I couldn't find any example in which particle+は is a topic maker.

So it is usually OK to take such words as contrastive ones.

The same applies to words like に対しては, によっては and others:


He might have a chance to win in some way. (by some particular method, not by the others)

Contrastive は is sometimes close to emphasis. In such cases は restricts the meaning of sentence into a particular region as in the sentence below:


The boy is good at studying, but he is still inexperienced as a mathematician.

In this sentence, は emphasizes the phrase [数学者として] by separating mathematicians and all the others. So the sentence implies that the speaker does not do any evaluation on the boy out of the domain of mathematicians.

  • Thanks, what if I find first a には、では、とは or even にとっては、に対しては、によっては、 and after that a normal は? How should I see that? Like this: "どちらの場合も、実際には質問の文はなくてもかまいませんが、要するに、(2)は「田中さん」が関心の対象になっている場合に、(3)は「お茶」が関心の対象になっている場合に、使うわけです。" I actually understand this, but it's just because it's a simple one with simple relative clauses. Maybe could you help me out with Particle+は or those like については、としては words?
    – Splikie
    Sep 17, 2016 at 14:50
  • I added my response to my answer. Please check it. Sep 17, 2016 at 15:32
  • Thank you. Regarding relative clauses, are に対しては、には、では part of them or are like は which cannot be in a relative clause?
    – Splikie
    Sep 18, 2016 at 12:22
  • 1
    They can be part of relative clauses. Example: ここは彼には特別な意味のある場所だ。 (This place has a special meaning for him.) The phrase [彼には特別な意味のある] modifies [場所]. Sep 18, 2016 at 13:22
  • Thank you for answering. What comes after は is usually a relative? Do you make a little pause after it?
    – Splikie
    Sep 18, 2016 at 14:46

は usually indicates the topic of the sentence.
The topic of the sentence is what the sentence is talking about, which is not necessarily the subject.
Let's see an example:

コーヒーは毎日飲んでいます。kōhī wa mainichi nonde imasu.
Speaking of coffee, I drink it every day.

When I say "コーヒーは", it means that I am going to talk about coffee.
As long as I don't change the topic, all subsequent sentences will all be about coffee. But coffee may not necessarily be the subject of the sentence.

Speaking of coffee,
I drink it every day
I love it,
I think it is delicious.

コーヒーは (kōhī wa)
毎日飲んでいますし、 (mainichi nonde imasu shi)
大好きだし、 (dai suki da shi)
とても美味しいと思います。 (totemo oshii to omoimasu)

Coffee is not the subject of the sentence. But all sentences after コーヒーは talk about coffee. Coffee is the topic of the sentences.
The subject is the pronoun "I" which can be omitted because it is obvious who the subject is.

Another example:

Speaking of Mr. Tanaka,
his house is tiny
but his dog is enormous.

田中さんは (Tanaka san wa)
家がとても小さいけど、 (uchi ga totemo chiisai kedo)
犬が凄く大きい。 (inu ga sugoku ookii)

Mr. Tanaka is neither the subject nor object of the sentences. But we are talking about his house and his dog, so he is the topic of the sentences.
The particle は has nothing to do with the subject or object of the sentence.

Both sentences below are acceptable:

田中さんの犬が大きい。(Tanaka san no inu ga ookii) Mr. Tanaka's dog is big.
田中さんは犬が大きい。 (Tanaka san wa inu ga ookii) Speaking of Mr. Tanaka, his dog is big.


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