に often marks where something exists or the endpoint it reaches; で marks where an activity occurs or the means used. 公園にいる means someone is at the park; 公園で遊ぶ means an activity happens there. 学校に行く gives the destination, while 電車で行く gives the means. Individual verbs such as 乗る and 座る have their own particle patterns.
also written ni / de / に / で
に — where something is, or where it lands · で — where something happens · で — also by what means
Sentences
6 sentences, word by word
に · where something simply is
polite
。
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公園
こうえん ［0］
park
noun · the place the cat occupies
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に
に
at; in (existence)
particle · marks where something is, with no action happening
にN5where something is
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猫
ねこ ［1］
cat
noun · introduced for the first time, hence が
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が
が
marks the subject
particle · what the sentence is about — with 好き, 分かる and potentials, the object
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います
います
there is (animate)
polite いる · animals and people take いる
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There's a cat in the park.
で · where something happens
polite
。
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子供
こども ［0］
children
noun · covers singular and plural without change
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が
が
marks the subject
particle · what the sentence is about — with 好き, 分かる and potentials, the object
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公園
こうえん ［0］
park
noun · the same park, now hosting an activity
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で
で
in; at (action)
particle · the space an activity fills
でN5where it happens
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遊びます
あそびます
play
polite form of 遊ぶ · a verb of doing, so で
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The children play in the park.
に · arriving somewhere
polite
。
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電車
でんしゃ ［0,1］
train
noun · here the means, not the destination
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で
で
by; by means of
particle · the instrument used to get there
でN5by means of
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学校
がっこう ［0］
school
noun · the endpoint of the movement
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に
に
to (destination)
particle · the point the going lands on
にN5to · destination
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行きます
いきます
go
polite form of 行く · movement toward, so に
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I go to school by train.
に · a time on the clock
polite
。
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明日
あした ［3］
tomorrow
noun used adverbially · relative times take no particle
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七時
しちじ
seven o'clock
time noun · a point you could put on a clock
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に
に
at (a point in time)
particle · clock and calendar times take に
にN5at · a point in time
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起きます
おきます
get up
polite form of 起きる · ichidan verb
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Tomorrow I get up at seven.
に · the target of a meeting
plain past
。
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駅
えき ［1］
station
noun · where the meeting took place
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で
で
at (action)
particle · meeting is something that happens, so で on the place
でN5where it happens
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友達
ともだち ［0］
friend
noun · the person met, marked as the target
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に
に
with; to (target)
particle · 会う takes に for the person, not と alone
にN5the target of 会う
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会った
あった
met
plain past of 会う · takes に for whom you met
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I met a friend at the station.
で · the field of comparison
polite
。
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富士山
ふじさん
Mount Fuji
proper noun · 山 read さん in this name
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は
は
as for — the topic
particle · written は, read わ
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日本
にほん ［2］
Japan
proper noun · here the scope of the claim, not a location
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で
で
in; within (scope)
particle · the field the superlative is measured inside
でN5within · scope
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一番
いちばん ［2,0］
the most
adverb · forming the superlative with the adjective that follows
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高い
たかい ［2］
tall; high
い-adjective · also means expensive, context decides
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山
やま ［2］
mountain
noun · the head noun the adjective describes
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です
です
(polite ending)
copula · the polite assertion
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Fuji is the tallest mountain in Japan.
Structure
Where does each particle attach?
Place＋に＋いる / ある / 住む
東京に住んでいます. Being, staying, living. Nothing is happening — something simply is there.
Place＋で＋遊ぶ / 働く / 食べる
公園で遊びます. An activity unfolding inside that space. The default for any verb of doing.
七時 / 月曜日 / 三月＋に
七時に起きます. Only for times you could put on a clock or calendar — 今日 and 明日 take no particle at all.
電車 / 木 / 日本語＋で
電車で行きます. By train, out of wood, in Japanese. The tool, material or medium used.
Meaning
How to choose between に and で
Ask whether anything is happening.公園にいます — I am at the park, full stop. 公園で遊びます — I play there. Same park, and the particle tracks whether the sentence describes a state or an activity.
に is a point that something reaches. That covers destinations (学校に行く), clock times (七時に), targets (友達に会う) and results (先生になる). All of them are arrivals of one kind or another.
で is the means as well as the place.電車で行く by train, 木で作る out of wood, 病気で休む because of illness. The through-line is that something is being used or undergone to get the result.
Verb-specific patterns matter too.電車に乗る takes に because you land onto the train, and 椅子に座る for the same reason. Meanwhile 電車で行く takes で — the train is the means, not the destination.
で also marks the field you are comparing within.日本で一番高い山 — the tallest mountain in Japan. Here Japan is the scope of the claim, not a place where anything happens.
Watch out
Where に and で go wrong
公園に遊ぶ
Playing is an activity, so the place takes で: 公園で遊ぶ. Reserve に for where something simply is.
電車で乗る
乗る takes に — you land onto the train. 電車に乗って、学校まで電車で行く uses both correctly in one breath.
Putting に after 今日 or 明日
Relative time words take no particle. 明日行きます, not 明日に行きます. Clock times and dates do take に.
Also asked
Questions people ask about に and で
What's the one-line rule?
に is where something is or where it lands. で is where something happens. If the verb is an action, reach for で first.
Why is it 電車に乗る but 電車で行く?
Different roles. In 乗る the train is what you get onto — an arrival point, so に. In 行く the train is how you travel — a means, so で.
に or へ for a destination?
Both work and に is more common. へ emphasises the direction of travel rather than the endpoint, and it sounds slightly softer or more written.
Why does 住む take に?
Because living somewhere is a state of being there, not an activity performed there. It joins いる, ある and 座る on the に side.
When does time take に and when does it not?
Absolute times — clock times, dates, months, days of the week — take に. Relative ones — 今日, 明日, 来週, 毎日 — take nothing.
What is the で in 日本で一番?
The scope of the comparison — the field within which the claim holds. It is the same で as in クラスで一番, top of the class.
