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は (wa) marks a topic, while が (ga) commonly marks a grammatical subject. They can appear in similar sentences, but they organize the information differently. A topic is what you are talking about; a subject is linked grammatically to the predicate. The two are not always the same.
Understanding は (wa)
Write the topic particle as は and pronounce it wa. This is a conventional particle spelling; the ordinary hiragana は is otherwise read ha. A common pattern is topic + は + comment. “As for…” can help you understand the topic, although a natural English translation often leaves it out.
| Japanese | Reading | Meaning |
|---|---|---|
| 私はジョンです。 | Watashi wa Jon desu. | I’m John. |
| 彼は医者です。 | Kare wa isha desu. | He is a doctor. |
| 靴は黒いです。 | Kutsu wa kuroi desu. | The shoes are black. |
| てんぷらは高いです。 | Tenpura wa takai desu. | Tempura is expensive. |
| 犬は動物です。 | Inu wa dōbutsu desu. | Dogs are animals. |
は can also express contrast, and a sentence may contain more than one は. It is incorrect to limit it to one use per sentence or call it a general subject marker in every case.
Context matters
At a café, 私はコーヒーです (Watashi wa kōhī desu) can mean “I’ll have coffee”. The topic is the speaker, and the understood comment is their drink choice. This does not make は equivalent to an English linking verb, and the same sentence needs the right context to make sense.
Understanding が (ga)
が commonly marks the subject. It often introduces new information or identifies who or what fits a description. It can also appear in a neutral report of something observed; it does not always imply a contrast with a hidden list of alternatives.
| Japanese | Reading | Meaning |
|---|---|---|
| だれがジョンさんですか。 | Dare ga Jon-san desu ka. | Who is John? |
| 私がジョンです。 | Watashi ga Jon desu. | I’m John (identifying myself). |
| 靴が黒いです。 | Kutsu ga kuroi desu. | The shoes are black. |
| てんぷらが高いです。 | Tenpura ga takai desu. | Tempura is expensive. |
The exact emphasis depends on the conversation. 靴が黒いです can identify the shoes as the black item in a contrastive context, but that is not the only reading. てんぷらが高いです does not mean that tempura is necessarily the most expensive food on a menu: 高い means expensive, not “the most expensive”.
Both particles in one sentence
| Japanese | Reading | Meaning |
|---|---|---|
| 田中さんは車があります。 | Tanaka-san wa kuruma ga arimasu. | Mr./Ms. Tanaka has a car. |
| サンドイッチは私が支度します。 | Sandoicchi wa watashi ga shitaku shimasu. | I will prepare the sandwiches. |
In the first example, 田中さん is the topic and 車 is the subject of あります. This is not a case of a separate subordinate clause automatically requiring が. In the second, the sandwiches are the topic, while 私 identifies the person who will prepare them. A topic can correspond to an object rather than the subject.
Choosing は or が
Start with the meaning and context. Use は to set up a topic or contrast. Use が to mark a subject, including an answer identifying “who” or “what”. Many subordinate clauses use が, but “all subjects inside another clause automatically take が” is too broad. The distinction becomes clearer through complete conversations rather than one English translation rule.
Practice the question だれが支度しますか (Who will prepare it?) and the answer 私が支度します (I will). Then make a topic statement such as 私は学生です (I am a student).
