# Wa vs ga: the difference, finally clear

> は (wa) frames what's already known, が (ga) points at new information. The core rule, the cases where が is mandatory, and a quick test to always pick right.

- Page: https://www.darumoji.com/en/guide/wa-vs-ga
- Content written by Darumoji: https://www.darumoji.com
- Published 2026-07-15

It's THE question every learner asks: when do you use は and when do you use が? Both seem to mark "the subject", but they play very different roles. Once the logic clicks, the choice becomes almost mechanical.

**は frames what's already known, が points at the new information.** Everything else follows from that single rule.

- **は (wa)**: Sets the **frame**: "as for X". The topic is already known to both speakers, the interesting information comes after it.
- **が (ga)**: Puts the **spotlight** on the word before it: that word is the new information. What comes before が is exactly what you wanted to know.

## The minimal pair

Take the same sentence with each of the two particles. Both are grammatically correct, but they don't answer the same question.

> 私は学生です。
>
> わたし wa がくせい です。
>
> I am a student.

Natural answer to "so, what do you do?". The topic 私 (わたし) is known, the new information is 学生 (がくせい).

> 私が学生です。
>
> わたし ga がくせい です。
>
> I am the student.

Answer to "who is the student?". が spotlights 私 (わたし): me, not someone else.

## Question words demand が

誰 (だれ, who), 何 (なに, what) or どれ (which one) can never be topics: by definition, the answer isn't known yet. So they always take が, and the answer keeps the same が.

> 誰が来ましたか。
>
> だれ ga きました か。
>
> Who came?

And the answer keeps が: 田中さんが来ました (たなかさん ga きました). Never は here.

## First mention, then follow-up

In a story, an element enters the scene with が (it's new), then becomes the topic with は (it's now known). It's the same mechanism as "a dog… the dog" in English.

> 公園に犬がいる。その犬は大きい。
>
> こうえん ni いぬ ga いる。その いぬ wa おおきい。
>
> There's a dog in the park. That dog is big.

犬 (いぬ) enters the scene with が, then gets picked back up with は.

## The quick test

Facing a sentence, run through these questions in order. The first one that matches gives you the particle.

1. Is the subject a question word, or the direct answer to a "who / what / which" question? → が.
2. Is the element appearing in the story for the first time? → が.
3. Are you talking about something already established, known to both speakers? → は.
4. Introducing yourself or describing a general frame? → は by default.

One last reflex: some verbs and adjectives like 好き (すき, to like), 分かる (わかる, to understand) or できる (can do) demand が on their complement. The full list lives in the dedicated が article.

> **Remember** **は frames the known, が points at the new.** Question word or first appearance → が. Established frame or introduction → は. And before 好き (すき) or 分かる (わかる), it's が, always.

- [は (wa): the topic particle, explained](https://www.darumoji.com/en/guide/japanese-particle-wa.md)

- [が (ga): subject marker and the wa vs ga trap](https://www.darumoji.com/en/guide/japanese-particle-ga.md)

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## Paste a sentence into the translator and watch where は and が land.

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- [All the particles](https://www.darumoji.com/en/guide/essential-japanese-particles)