Japanese Particles: Ask What the Word Is Doing

Most languages show a word's job by its position in the sentence. Japanese marks the job with one short particle after the word.

Two short sentences, one about what you are doing and one about where a thing is:

写真を撮ります。しゃしんをとります。 (shashinwotorimasu.)

(I) will take a photo.

机の上に鍵があります。つくえのうえにかぎがあります。 (tsukuenouenikagigaarimasu.)

There is a key on the desk.

Position does none of that work here. を (wo) names the photo as the thing the verb acts on, and に (ni) names the desk as the place where the key is.

Ask what each noun is doing in the sentence you are building, and the particle follows. Do not ask it for は (ha) and が (ga), because those two are chosen by what the listener already knows.

Particles are usually presented as a set to learn, one entry at a time. The choice becomes a different task when you start from the word rather than from the particle.

Ask what the word is doing in this sentence. The answer is a job, and each job has its own particle.

A list of particles gives you meanings, and meanings are not what is missing when you build a sentence. What is missing at that moment is a decision about one word.

Word order itself is a separate subject, and the field note on sentence structure takes that one. Here the only rule you need is that the particle comes straight after its own word.

These are the jobs a beginner sentence keeps needing, with the question that names each one:

One particle can answer more than one question, and that is not a contradiction. で (de) covers where something happens and by what means it happens, and the question keeps those apart.

Reading the Particle column on its own gives you the list again. The question column is the part that decides.

Read it in that order and the particles stop competing with each other. Each one is the answer to a question you already asked about your own sentence.

The rest of this note takes the jobs one at a time, in the order you meet them while building a sentence.

Find the thing the verb acts on, and that noun takes を (wo). It is what is made, taken, or written.

The test question is “what?” Ask it of the verb, and the noun that answers is the one to mark.

Say what you are about to send a colleague:

メールを書きます。メールをかきます。 (meeruwokakimasu.)

(I) will write an email.

Swap that を (wo) for が (ga) and the sentence turns around.

❌ メールが書きますメールがかきます (meerugakakimasu) — the email would be the one doing the writing

⭕ メールを書きますメールをかきます (meeruwokakimasu) — the email is what is written

The one doing the action never takes を (wo), and that noun takes は (ha) or が (ga) instead. Write the particle as を (wo), never お (o), because only を (wo) marks the object.

The object also keeps its を (wo) while the verb changes around it. 写真を撮りますしゃしんをとります (shashinwotorimasu) becomes 写真を撮りましたしゃしんをとりました (shashinwotorimashita) once the photo is taken, and the noun in front of the verb does not move.

The tense is decided at the end of the sentence, and the marked noun is finished as soon as you say it.

Verbs and their objects also travel in pairs, and learning them together helps you recall the right verb. 作るつくる (tsukuru) takes a meal, 撮るとる (toru) takes a photo, and 書くかく (kaku) takes a letter or an email.

A place word can take either に (ni) or で (de), and the verb decides which. に (ni) marks where something is, and で (de) marks where an action happens.

The test is whether anyone is doing anything there. If you can see someone doing something at that spot, the spot takes で (de).

Take one place and two verbs. 部屋にいるへやにいる (heyaniiru) is being there, and 部屋で本を読むへやでほんをよむ (heyadehonwoyomu) is reading a book there.

The place is the same in both, and the verb is what changes the particle.

Arrival behaves like existence here. 駅に着きますえきにつきます (ekinitsukimasu) names the point you reach, and reaching a point is not doing something at a place.

So the question to ask is about the verb, and not about the place. A gym, a café, and a home can each take either particle, depending on what happens there.

Say where you live, and the same test applies:

❌ 大阪で住んでいますおおさかですんでいます (oosakadesundeimasu) — で (de) needs an action, and living is not one

⭕ 大阪に住んでいますおおさかにすんでいます (oosakanisundeimasu) — 住むすむ (sumu) describes existing in a place

いる (iru), ある (aru), 住むすむ (sumu), and 着くつく (tsuku) all take に (ni). In many languages “live” and “stay” sound like actions, and Japanese counts them as existence instead.

So the same place name switches particles when the verb switches. Nothing about the place itself decided anything.

The other で (de) names the means rather than the place. A noun takes で (de) when it answers the test question “by what means?”

English splits this idea across “by,” “with,” and “in,” while Japanese routes all of it through one で (de). It is the same で (de) as the one for place, doing a different job.

At a register the card is what you pay with, and not what you pay:

❌ カードを払いますカードをはらいます (kaadowoharaimasu) — を (wo) would make the card itself what you pay

⭕ カードで払いますカードではらいます (kaadodeharaimasu) — the card is the means

The same で (de) reaches tools, materials, and languages. はしで (hashide) is with chopsticks, and 日本語でにほんごで (nihongode) is in Japanese.

Going on foot is the one to watch, because Japanese does not say 足であしで (ashide). Everyday speech says 歩いてあるいて (aruite), and signs use 徒歩でとほで (tohode).

In this sense 何でなにで (nanide) asks by what means. Read the same word as 何でなんで (nande) and it means why, and the reading is what keeps them apart.

Where you are headed is a separate job again, and it takes に (ni) or へ (he). With 行くいく (iku), 来るくる (kuru), and 帰るかえる (kaeru), either particle is correct.

Say when a friend is coming to meet you:

あした、友だちが駅へ来ます。あした、ともだちがえきへきます。 (ashita,tomodachigaekihekimasu.)

A friend is coming to the station tomorrow.

The freedom ends when the verb names an exact point. 会うあう (au), 着くつく (tsuku), and 入るはいる (hairu) take に (ni) only, and in front of a noun the form is への (heno), never にの (nino).

A time word takes に (ni) when it names a fixed point on a clock or a calendar. Clock times, weekdays, dates, and months take it.

Words that point at now stay bare. 今日きょう (kyou) and 毎日まいにち (mainichi) shift as the day moves, so they never take に (ni).

That is the whole judgment here, and it shows in one small pair:

❌ 明日に行きますあしたにいきます (ashitaniikimasu) — 明日あした (ashita) points at now, so it stays bare

⭕ 明日行きますあしたいきます (ashitaikimasu) — a relative time word takes no particle

A repeating habit is not one fixed point either. 毎日まいにち (mainichi) and 毎週まいしゅう (maishuu) name how often something happens, so there is no calendar label for に (ni) to mark.

A weekday keeps に (ni) even where speakers drop it in casual talk. Adding it is never wrong while you are learning.

週末しゅうまつ (shuumatsu) goes both ways, and you will hear it with に (ni) and without. When you are unsure, adding に (ni) is the safe choice.

By now に (ni) has answered more than one question in this note. Each answer came from the question rather than from the particle, and that does not change from particle to particle.

は (ha) and が (ga) do not answer the same kind of question. They are chosen by what the listener already knows, and not by the job the word is doing.

Use が (ga) when the subject is new to the listener, such as something that appears in front of you. Use は (ha) when you both already know the thing and you are saying more about it.

That pair has more to it, and the field note on sentence structure answers it there. It also has a drill to itself, apart from the particles in the table.

Everything else here comes back to the same question. Once the job has a name, the particle has already been decided.

Name the job the word is doing, and only one particle fits it.

に (ni) and で (de) split a place by the verb, not by the place itself.

A particle is a short word attached to the end of the word it marks, and it names that word's job in the sentence. The job comes first, and the particle follows from it.

The particles in the table cover most of what you will say at this level. The others come later, once your sentences get longer.

The verb decides it, and not the place. 住むすむ (sumu) and いる (iru) count as existing, so they keep に (ni).

食べるたべる (taberu) and 働くはたらく (hataraku) are things you do at a place, so they take で (de). 着くつく (tsuku) names a point you reach, so it keeps に (ni) as well.

In relaxed speech they often drop を (wo), and ごはん食べた？ごはんたべた？ is normal between friends. You will hear it long before you need to use it.

Keep the particle while you are learning, because writing and careful speech use the full form.

Inside Ukiyoe Japanese the same judgment is a page and a practice. The N5 grammar pages take one particle job at a time, each with its own reviewed sentences and mistakes. Particle gym then gives you sentences with one particle taken out, and the question is what puts it back.