Wa vs Ga in Japanese: When to Use は and が
は (wa) marks the topic, what the sentence is about, and が (ga) marks the subject, often new or important information. A simple rule of thumb: use は for something already known or being talked about, and が when you introduce something new, answer “who” or “what”, or after question words. が also follows likes, dislikes, abilities and “there is”, and is used inside clauses. These few rules cover most everyday sentences, and the rest comes with listening and correction.
Topic vs subject
In English, “I” in “I’m a student” is the subject. Japanese adds a separate idea, the topic: “as for me…”. 私は学生です means “As for me, (I) am a student.” The topic sets the scene, and the rest of the sentence comments on it. が marks who or what does the action or has the quality, without that “as for” framing.
The main rules
| Situation | Use | Example |
|---|---|---|
| Known topic, general statement | は | 東京は大きいです。 Tokyo is big. |
| New information, noticing something | が | あ、雨が降っています。 Oh, it’s raining. |
| After question words | が | 誰が来ましたか。 Who came? |
| Answering “who” or “which” | が | 田中さんが来ました。 Tanaka came (it was Tanaka). |
| Contrast | は | 肉は食べますが、魚は食べません。 Meat I eat, but fish I don’t. |
| Likes, skills, wants, understanding | が | 猫が好きです。日本語ができます。 |
| There is / have | が | 駅の前に銀行があります。 |
| Inside a clause | が | 母が作ったケーキ the cake my mother made |
One sentence, two particles
Many sentences use both. In 私は日本語が好きです (“I like Japanese”), 私は is the topic and 日本語が is the thing liked. The classic example 象は鼻が長い (“Elephants have long trunks”, literally “as for elephants, the trunk is long”) shows the same pattern.
Common mistakes
- Using は after question words. 何は and 誰は are wrong; say 何が, 誰が.
- Repeating the topic. Once 私は is clear, Japanese drops it. Saying it in every sentence sounds unnatural or contrastive.
- Using は inside clauses. “The book I bought” is 私が買った本, not 私は買った本.
- Introducing yourself with が. 私がスミスです means “I’m the one who is Smith”, an answer to “Which one is Smith?”. In a normal introduction, use は. See how to introduce yourself in Japanese.
How to get it right in practice
- Learn chunks. Memorise whole patterns such as 〜が好きです, 〜がわかります and 〜があります.
- Notice the question. If you’re answering “who” or “what”, the answer takes が.
- Read and listen a lot. Native-like choices come from exposure. See how to start reading in Japanese and shadowing.
- Get corrected. Errors with は and が rarely stop people understanding you, so nobody points them out. A tutor will. For the other particles, see Japanese particles explained.
How Hanabuddies can help
Our native Japanese tutors teach one-to-one online, in English. In lessons we explain は and が with examples from your own sentences, correct your speaking and writing as you go, and give you short practice tasks until the choice feels natural.