まま is a bound noun (a noun that cannot stand alone) meaning "as is / while remaining in the same state." It takes a state-describing modifier in front of it and asserts that a second action happens without that state changing. 靴（くつ）を履（は）いたまま入（はい）る is "to go in with your shoes still on"; 昔（むかし）のまま is "just as it was long ago." The single most important thing to get right about まま is what it is not: it is not 〜ながら. This whole page is built around keeping those two apart, because English collapses both into "while," and choosing wrong is one of the most common intermediate errors.
What まま does: freeze a state, then act inside it
まま attaches to something that describes a state, and then says another action occurs while that state persists, unchanged. Three things can precede it:
- Verb in た-form (a resultant state): 立（た）ったまま, つけたまま, 開（あ）けたまま — "in the state of having stood / turned on / opened."
- Verb in ない-form (a state of not having done something): 何（なに）も食べないまま — "in the state of not having eaten anything."
- Noun + の or na-adjective + な or い-adjective: 昔のまま, きれいなまま, 若（わか）いまま.
立ったまま食べるのは体に悪いらしい。
tatta mama taberu no wa karada ni warui rashii
They say eating while standing is bad for you.
電気をつけたまま寝てしまった。
denki o tsuketa mama nete shimatta
I fell asleep with the light still on.
窓を開けたまま出かけて、雨が入ってしまった。
mado o aketa mama dekakete, ame ga haitte shimatta
I went out with the window left open, and the rain got in.
In each one, the first verb names a state that has been reached and stays reached while the second action happens: you stood up and remain standing while eating; you turned the light on and it stays on while you sleep; you opened the window and it stays open while you are out. The action of standing, switching on, or opening is already over — what continues is its result.
What 〜ながら does: two ongoing actions at once
〜ながら links two actions the same person is doing simultaneously, both as ongoing processes. It attaches to the verb stem (the ます-stem: 聞（き）き〜, 歩（ある）き〜, 見〜), not to た.
音楽を聞きながら勉強する。
ongaku o kikinagara benkyō suru
I study while listening to music.
歩きながらスマホを見るのは危ない。
arukinagara sumaho o miru no wa abunai
Looking at your phone while walking is dangerous.
Here nothing is "frozen." Listening and studying are both actively unfolding; walking and looking are both in progress. There is no persisting result — there are two live actions running in parallel.
The core contrast: state held vs actions in parallel
Put the two side by side on the same idea — "eat while standing" vs "eat while walking":
| 〜まま | 〜ながら | |
|---|---|---|
| Attaches to | た-form / ない-form / noun+の (a state) | verb stem (ます-stem) |
| Meaning | a state stays unchanged while X happens | two actions happen at the same time |
| Example | 立ったまま食べる (eat while standing) | 歩きながら食べる (eat while walking) |
| What continues | the result of the first verb | the action of the first verb |
立ったまま食べる。
tatta mama taberu
I eat while standing. (standing is a held state — I'm not 'doing standing')
歩きながら食べる。
arukinagara taberu
I eat while walking. (walking and eating are two live actions running together)
Why is 立ったまま natural but 立ちながら odd? Because 立つ is a change-of-state verb — "to stand up", a momentary transition — not a durative activity you keep performing. Once you have stood up, "standing" is a state you are in, not an action you are doing. まま describes exactly that held state. 歩く, by contrast, is a durative action you continuously perform, so it pairs with ながら. The grammatical form follows the semantics: held result → まま; ongoing activity → ながら.
Noun + の + まま: the state of a thing unchanged
まま does not need a verb at all. Noun + の + まま (or na-adjective + な + まま, い-adjective + まま) says a thing remains in the condition named.
この町は子供の頃のままだ。
kono machi wa kodomo no koro no mama da
This town is exactly as it was when I was a child.
ありのままの自分でいたい。
ari no mama no jibun de itai
I want to be my true self — just as I am.
何も言わないまま帰ってしまった。
nani mo iwanai mama kaette shimatta
He went home without saying anything (in a state of having said nothing).
That last one shows the ない-form: 言わないまま = "in the state of not having spoken." ながら could never render this — there is no ongoing action of "not speaking" to run in parallel.
そのまま・このまま: the everyday set phrases
By far the most frequent まま in daily speech attaches to a demonstrative: そのまま ("as it is, unchanged, like that"), このまま ("staying just like this"), あのまま. These are all-purpose and worth having ready-made.
そのままにしておいてください。
sono mama ni shite oite kudasai
Please leave it just as it is.
このままだと、電車に間に合わないよ。
kono mama da to, densha ni maniawanai yo
At this rate, we're not going to make the train.
このままだと ("if things stay like this") is one of the most useful まま frames going — it names the current unchanged state and warns about where it leads. Notice how much English variety maps onto this one Japanese word: "with the light on", "without eating", "at this rate", "as is", "just as it was" — four or five different English constructions, one unifying Japanese idea of a single held, unchanging state.
Common mistakes
❌ 立ちながら食べるのは体に悪い。
Wrong (for a held posture) — 立つ is a change-of-state verb; 'standing' is a state, not an ongoing action. Use the resultant-state まま.
✅ 立ったまま食べるのは体に悪い。
tatta mama taberu no wa karada ni warui
Eating while standing is bad for you.
❌ 歩いたまま話しましょう。
Wrong — walking and talking are two live actions in parallel, not one frozen state. This needs ながら, on the verb stem.
✅ 歩きながら話しましょう。
arukinagara hanashimashō
Let's talk while we walk.
❌ 電気をつけるまま寝てしまった。
Wrong — the dictionary form つける can't precede まま. You need the resultant-state た-form: the light was turned on and stayed on.
✅ 電気をつけたまま寝てしまった。
denki o tsuketa mama nete shimatta
I fell asleep with the light on.
❌ この町は昔まま変わっていない。
Wrong — a noun before まま needs の. Without it the phrase has no link.
✅ この町は昔のまま変わっていない。
kono machi wa mukashi no mama kawatte inai
This town remains just as it was long ago.
Key takeaways
- まま = an unchanged state. A result is reached and held constant while a second action happens: 靴を履いたまま入る, 窓を開けたまま出かけた.
- It attaches to a state: the resultant-state た-form, the ない-form, or noun + の (na-adj + な, い-adj bare).
- 〜ながら = two simultaneous actions, attaches to the verb stem, and needs a durative verb: 歩きながら食べる.
- The tell: change-of-state verbs (立つ, つける, 開ける, 座る) take まま; durative activities (歩く, 聞く, 見る) take ながら. They are not interchangeable.
- English "while" hides this split — always ask whether one thing is a held state or whether two actions run together.
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- Tense Inside Modifying ClausesN3 — The tense of a pre-nominal clause is relative to the head noun's own timeframe, not to the main verb — and inside a modifier た very often marks a resultant state (割れたコップ 'a broken cup', 曲がった道 'a winding road') rather than past time.
- Relative Clauses (連体修飾): No Relative PronounN4 — Japanese has no relative pronoun — no 'that', 'which', or 'who'; to modify a noun with a whole clause you simply place a plain-form clause directly in front of it, exactly the way an adjective sits in front of a noun.
- Gapless Modifying Clauses (外の関係)N2 — In the 'outer relation', the head noun names the content, result, or circumstance of the clause before it rather than filling a slot inside it — so 魚を焼く匂い is 'the smell of grilling fish', and 匂い is no argument of 焼く at all.