You already have a full guide to は and が in Japanese particles explained: wa vs ga.
This page is different: a decision flow + examples only, for the moment you’re mid-sentence and need a pick.
Use our Japanese basics hub, drill on the Japanese beginner mixed quiz, and pair with question particles か・の・ん—questions and は/が often show up in the same breath.
Flow (read top to bottom)
1. Are you answering an implicit “who / what” question?
→ Prefer が for the “answer” part.
- 誰が来ましたか？ → 田中さんが来ました。 (Tanaka-san ga kimashita.)
2. Are you introducing new information the listener doesn’t know yet?
→ Often が (identifier).
- 猫がいます。 (Neko ga imasu.) — “There’s a cat.” (new sighting)
3. Are you setting the topic for the whole comment (“as for X…”)?
→ は.
- 象は鼻が長いです。 (Zou wa hana ga nagai desu.) — “As for elephants, their noses are long.”
4. Are you contrasting (“X, but not Y”)?
→ は often marks the contrasted items.
- 水は飲みます。お酒は飲みません。 (*Mizu wa nomimasu.
Osake wa nomimasen.*)
5. Still stuck?
Default は for broad “about this thing…” statements; が when you’re pointing at which one or what showed up.
Three minimal pairs (feel the shift)
| Pattern | Vibe |
|---|---|
| 私は学生です。 (Watashi wa gakusei desu.) | “As for me, (I’m) a student.” (topic introduction) |
| 学生がいます。 (Gakusei ga imasu.) | “There is a student.” (existence / scene) |
| Pattern | Vibe |
|---|---|
| 雨が降っています。 (Ame ga futteimasu.) | “It’s raining.” (natural “what’s happening”) |
| 今日は雨です。 (Kyou wa ame desu.) | “Today, it’s rain.” (topic = today) |
What this page is not
- Not a list of every exception academic grammar covers.
- Not a replacement for the longer article—use that when you want rules explained slowly.
Practice loop
Take one scene (café, street, classroom).
Write two sentences: one topic は comment, one new info が observation.
Say them aloud.
Then load them into StudyArcade so you’re not only reading silently.
Tie-in phrases: te-form patterns often sit next to は/が in real speech.
Ready to make studying fun? Download StudyArcade on the App Store:
https://apps.apple.com/app/studyarcade-study-games/id6759309341