Japanese Grammar

は (wa) vs が (ga): The Essential Guide

The は/が distinction is the most-asked question in Japanese learning. This guide gives you clear, practical rules—not vague theories.

Why は and が confuse everyone

は (wa) and が (ga) both follow the subject of a sentence, which is why learners often mix them up. However, they serve completely different purposes.

は (wa) is the 'topic marker'. It says: 'We are now talking about this.' It can mark subjects, objects, or anything else the speaker wants to highlight as the topic.

が (ga) is the 'subject marker'. It specifically identifies WHO or WHAT performs the action. Understanding this core difference will unlock most situations.

Core Usage Rules

は (wa) — Topic Marker

General statements / facts

→日本語は難しいです。

Japanese is difficult. (topic = Japanese in general)

Contrasting two things

→魚は食べますが、肉は食べません。

I eat fish, but (as for) meat, I don't eat.

Known information (old topic)

→犬はかわいいです。

Dogs are cute. (a general, known fact)

が (ga) — Subject Marker

Introducing NEW information

→犬が来た！

A dog came! (unexpected/new info)

Answering 'WHO/WHAT' questions

→誰が来ましたか？→ 田中さんが来ました。

Who came? → Tanaka-san came.

With desire/ability (~がほしい/〜がすき/〜ができる)

→水が飲みたいです。

I want to drink water. (object of desire)

Both are correct (but mean different things)

私は田中です。

→私が田中です。

I am Tanaka. (は: general intro) vs I am THE Tanaka. (が: I'm the one!)

猫は好きです。

→猫が好きです。

As for cats, I like them. vs Cats are what I like.

Example Sentences

A: 誰が日本語を話せますか？ B: 田中さんが話せます。

A: Dare ga nihongo o hanasemasu ka? B: Tanaka-san ga hanasemasu.

A: Who can speak Japanese? B: Tanaka-san can. (が identifies the answer)

私は学生です。日本語は難しいですが、面白いです。

Watashi wa gakusei desu. Nihongo wa muzukashii desu ga, omoshiroi desu.

I am a student. Japanese is difficult, but interesting. (は for topics)

あ、雨が降っている！

A, ame ga futte iru!

Oh, it's raining! (が for new/unexpected information)

Teacher's Advice by Language Background

Vietnamese Learners

Vietnamese doesn't have grammatical particles like は and が, so both feel equally foreign at first. The easiest shortcut: when answering a 'who?' or 'what?' question, always use が for the answer. For general statements about a topic, use は.

Indonesian Learners

Indonesian also lacks a topic/subject particle distinction. Remember: は (wa) = 'Mengenai...', が (ga) = the actual doer of the action. When you want to emphasize WHO did something, use が.

Mongolian Learners

Mongolian uses case suffixes that vaguely correspond to は and が, but the topic vs. subject distinction is more prominent in Japanese. Focus on the 'new vs. known information' rule—が for new info, は for established topics.

JLPT Exam Patterns

•は vs が in fill-in-the-blank grammar questions (N5, N4)
•〜が好きです / 〜が嫌いです — always use が for likes/dislikes (N5)
•〜ができます — always use が for ability (N5)
•〜がほしいです — always use が for wanting things (N5)
•Contrastive は: 「〜はAですが、〜はBです」(N5)

Related Grammar

The Ultimate Particles Cheat Sheet

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に (ni) vs で (de): Location Particles

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Explanation & Emphasis: 〜んです / 〜のです

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See the full JLPT N5 grammar roadmap →

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