Basic Particles は/が/を/に in Japanese

Overview

Particles are small words that follow nouns (and sometimes other elements) to indicate their grammatical role in a sentence. They are the backbone of Japanese sentence structure. Unlike English, which relies heavily on word order to convey meaning, Japanese uses particles to show who does what to whom, making word order relatively flexible.

The four most fundamental particles are は (wa, topic marker), が (ga, subject marker), を (wo/o, direct object marker), and に (ni, indirect object/location/time marker). Together, these four particles appear in virtually every Japanese sentence you will encounter at CEFR A1 and beyond.

Understanding these particles is arguably the single most important grammar skill in Japanese. English speakers often struggle because there is no direct equivalent -- English does not have topic markers or subject markers as separate words. Take your time with these, practice them in context, and know that even advanced learners continue refining their understanding of は vs. が.

How It Works

は (wa) -- Topic Marker

Marks what the sentence is about. Often translates as "as for..." or is simply the subject in English.

Pattern	Example
[Topic] は ...	私は日本人です。(watashi wa nihonjin desu) -- I am Japanese.

• Sets the topic of conversation
• Can mark something previously mentioned or generally known
• Pronounced "wa" despite being written with the hiragana は (ha)

が (ga) -- Subject Marker

Marks the grammatical subject, especially for new information, existence, or ability.

Pattern	Example
[Subject] が ...	猫がいます。(neko ga imasu) -- There is a cat.

• Used for new information ("A cat is here" vs. "The cat is here")
• Required with certain verbs: いる/ある (exist), 分かる (understand), 好き (like), 欲しい (want)
• Used in questions with question words: 誰が来ましたか？(dare ga kimashita ka) -- Who came?

を (o) -- Direct Object Marker

Marks the direct object of an action verb.

Pattern	Example
[Object] を [Verb]	本を読みます。(hon o yomimasu) -- I read a book.

• Always followed by an action verb
• Pronounced "o" despite being written with を
• Also used with movement verbs for the path: 公園を歩く (kouen o aruku) -- walk through the park

に (ni) -- Indirect Object / Location / Time

A versatile particle with several core uses:

Use	Pattern	Example
Direction/destination	[Place] に行く	学校に行きます。(gakkou ni ikimasu) -- I go to school.
Location of existence	[Place] にいる/ある	机の上にあります。(tsukue no ue ni arimasu) -- It's on the desk.
Indirect object	[Person] にあげる	友達にあげます。(tomodachi ni agemasu) -- I give to a friend.
Time	[Time] に	三時に会います。(sanji ni aimasu) -- I meet at 3 o'clock.

は vs. が -- The Key Distinction

は (topic)	が (subject)
Known/old information	New information
"As for X..."	"X is the one that..."
Contrast	Neutral description
私は学生です。(I am a student.)	私が学生です。(I am the student [not someone else].)

Examples in Context

Japanese	English	Note
私は日本人です。	I am Japanese. (watashi wa nihonjin desu)	は marks topic
猫がいます。	There is a cat. (neko ga imasu)	が with existence verb
本を読みます。	I read a book. (hon o yomimasu)	を marks object
学校に行きます。	I go to school. (gakkou ni ikimasu)	に marks destination
田中さんは先生です。	Mr. Tanaka is a teacher.	は for known person
誰が来ましたか？	Who came?	が with question word
水を飲みます。	I drink water.	を marks what is drunk
七時に起きます。	I wake up at 7. (shichiji ni okimasu)	に marks time
日本語は難しいです。	Japanese is difficult.	は for general statement
雨が降っています。	It is raining. (ame ga futte imasu)	が marks natural phenomenon

Common Mistakes

Confusing は and が

• Wrong: 誰は来ましたか？
• Right: 誰が来ましたか？
• Why: Question words like 誰, 何, どこ always take が, not は, because they ask for new information.

Using を with non-action verbs

• Wrong: 日本語を分かります。
• Right: 日本語が分かります。
• Why: Certain verbs like 分かる (understand), 好き (like), and できる (can do) take が instead of を.

Omitting particles entirely

• Wrong: 私学生です。
• Right: 私は学生です。
• Why: While particles are sometimes dropped in very casual speech, beginners should always include them to build correct habits.

Using に for the location of actions

• Wrong: レストランに食べます。
• Right: レストランで食べます。
• Why: に marks where something exists or a destination. For where an action takes place, use で. (See Location Particles.)

Practice Tips

• Color-code particles when studying. Highlight は in one color, が in another, を in a third, and に in a fourth. This visual approach helps you see sentence structure patterns more quickly.

• Practice particle substitution drills. Take a simple sentence and swap particles to see how meaning changes: 猫は寝ています (the cat is sleeping) vs. 猫が寝ています (a cat is sleeping / it's the cat that is sleeping).

• Build sentences incrementally. Start with just a verb (食べます), add an object (パンを食べます), then a topic (私はパンを食べます), then a time/place (朝、私はパンを食べます).

Related Concepts

• Next steps: Location Particles で/に/へ -- more detail on where actions and existence happen
• Next steps: Godan Verbs (u-verbs) -- verbs that particles attach to
• Next steps: Ichidan Verbs (ru-verbs) -- the other main verb class
• Next steps: Existence Verbs いる/ある -- verbs that require が and に
• Next steps: Question Words -- interrogatives that interact with particles
• Next steps: Requests ください -- polite requests using particles
• Next steps: Particle も (also/too) -- a particle that replaces は/が
• Next steps: から/まで (from/until) -- range particles
• Next steps: Time Marker に -- deeper look at に for time
• Next steps: Only だけ/しか -- limiting particles