は vs が: The Core Distinction
Quick Answer: は (wa) marks the topic (what we're talking about), while が (ga) marks the subject (who/what performs the action or is described). は sets the stage; が spotlights the actor.
Understanding the most fundamental particle choice in Japanese
Category: Particles
The Rule
は (wa) marks the topic (what we're talking about), while が (ga) marks the subject (who/what performs the action or is described). は sets the stage; が spotlights the actor.
Why This Matters
English doesn't distinguish topic from subject, so this is one of the hardest concepts for English speakers. Think of は as 'As for...' and が as 'It is... that...' は provides context; が provides new or contrasting information.
Examples
• 私は学生です。 — "I am a student." [は marks 'I' as the topic — general self-introduction] • 誰が来ましたか？ — 田中さんが来ました。 — "Who came? — Tanaka-san came." [が answers a 'who' question — new information] • 象は鼻が長い。 — "As for elephants, their noses are long." [は for topic (elephant), が for subject (nose) — double particle sentence] • 今日は天気がいいですね。 — "The weather is nice today, isn't it?" [は marks time topic, が marks weather as the described subject]
Common Mistakes
❌ 誰は来ましたか？ ✅ 誰が来ましたか？ → Question words like 誰, 何, どこ always take が, never は, because they ask for new information ❌ 私が田中です。(in self-introduction) ✅ 私は田中です。 → For general self-introduction, use は. Using が would imply 'I am the one who is Tanaka' — answering who Tanaka is
Quick Tip
When in doubt, use は for known/old information and が for new/unknown information. After question words (誰, 何, どこ), always use が.
When in doubt, use は for known/old information and が for new/unknown information. After question words (誰, 何, どこ), always use が.
Examples
Common Mistakes
Incorrect: 誰は来ましたか？ → Correct: 誰が来ましたか？. Question words like 誰, 何, どこ always take が, never は, because they ask for new information
Incorrect: 私が田中です。(in self-introduction) → Correct: 私は田中です。. For general self-introduction, use は. Using が would imply 'I am the one who is Tanaka' — answering who Tanaka is
Quiz
Fill in the blank: 「＿＿が好きですか？」 — 「寿司＿＿好きです。」