The Moraic ん and Its Readings | Japanese Grammar

Almost every kana is a full consonant-plus-vowel syllable: か is ka, み is mi. The kana ん (katakana ン) is the one exception — a lone nasal consonant with no vowel attached. Two facts about it surprise every English speaker. First, it counts as a full beat (mora) all by itself. Second, its actual sound changes depending on what comes after it — yet it is always written the same way. Getting ん right is what makes にほん sound like real Japanese rather than a clipped "Nippon."

ん is a whole beat

Japanese rhythm is counted in morae — evenly timed beats — and ん is one of them. The word にほん is not two syllables but three morae: に・ほ・ん. That final ん is held for its own full beat, roughly as long as に or ほ.

私は日本に住んでいます。

watashi wa nihon ni sunde imasu

I live in Japan.

To an English ear "Japan/Nippon" feels like it ends the moment the n is pronounced. In Japanese, 日本（にほん）gives that final ん its own beat: ni-ho-n, three counts. Rush it and the word sounds wrong to a native listener. For the underlying rhythm concept, see mora vs syllable.

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Count on your fingers as you say にほん: に (1), ほ (2), ん (3). If your third finger goes up as you hold a hummed n, you have it. If にほん feels like two beats, you are dropping the mora.

ん never begins a word

No native Japanese word starts with ん. Its very nature is to close a mora, leaning on the sound before it, so it cannot open a word. This is not a spelling ban you have to memorize separately — it falls out of what ん is.

There is a charming proof of this baked into Japanese culture: in しりとり (shiritori), the word-chain game where each player must say a word starting with the last kana of the previous one, saying a word that ends in ん loses the game instantly — because no one can continue from ん.

「りんご」って言ったら、次は「ご」からだよ。

'ringo' tte ittara, tsugi wa 'go' kara da yo

If you say 'ringo', the next word has to start with 'go'.

The sound assimilates — but the spelling never does

Here is the part that confuses learners. The single kana ん is pronounced in several different ways depending on the sound that follows it. Your mouth naturally prepares for the next sound, so ん takes on its place of articulation. Crucially, all of these are written ん — the spelling is fixed even though the sound shifts.

Before…	ん sounds like…	Example
b, p, m	[m]	しんぶん → "shimbun", さんぽ → "sampo"
k, g	[ŋ] (as in "sing")	りんご → "ringo", けんか → "keŋka"
t, d, n, ts, z	[n]	おんな → "onna", うんてん → "unten"
vowels, y, w, s, h, or end of word	[ɴ] (uvular / nasalized)	にほん, ほんや, でんわ

毎朝、新聞を読みながらコーヒーを飲む。

maiasa, shinbun o yominagara kōhī o nomu

Every morning I read the newspaper while drinking coffee.

新聞（しんぶん）is spelled with ん, but because a b follows, your lips close and it comes out as [m] — "shimbun." You do not choose this; it happens automatically. Try saying "shin-bun" with a crisp n and you will feel how much more effort it takes.

天気がいいから、公園を散歩しよう。

tenki ga ii kara, kōen o sanpo shiyō

The weather's nice — let's take a walk in the park.

散歩（さんぽ）works the same way: ん before p becomes [m], "sampo."

りんごを一つください。

ringo o hitotsu kudasai

One apple, please.

In りんご the ん sits before g, so it becomes the [ŋ] of English "sing" — the n in "ringo" is not the n of "run."

兄弟でよくけんかしたものだ。

kyōdai de yoku kenka shita mono da

My siblings and I used to fight a lot.

あとで電話するね。

ato de denwa suru ne

I'll give you a call later.

電話（でんわ）ends its first mora with ん before w, giving the uvular/nasalized [ɴ] — the sound just hums in the back of the mouth without the tongue touching anything.

The "m or n?" spelling puzzle in romaji

Because ん genuinely sounds like [m] before b, p, and m, some romanization systems spell it that way. Traditional Hepburn writes m there — which is why train stations and newspapers give us Shimbashi (新橋), Namba (難波), and the Asahi Shimbun. Revised Hepburn and most modern systems keep n everywhere — Shinbashi, shinbun.

This trips people up: they see "shimbun" and "shinbun" and assume there are two different kana, or that they misheard. There are not. Both spellings represent the exact same ん. The m is just an honest attempt to write the assimilated sound; the n stays faithful to the kana.

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Whenever you meet an m before b/p/m in romanized Japanese — tempura, sempai, Gumma — it is the moraic ん wearing its [m] disguise. It is never a separate letter. In this guide's romanization lines we write ん as n throughout, and describe the [m] sound in prose.

The apostrophe: ん before a vowel or y

When ん is followed by a vowel or by や/ゆ/よ, romaji adds an apostrophe to show that the ん is its own mora and does not merge with the next sound.

駅前の本屋で待ち合わせしよう。

ekimae no hon'ya de machiawase shiyō

Let's meet up at the bookstore in front of the station.

本屋（ほんや）is hon'ya — three morae, ho-n-ya — a bookstore. Without the apostrophe, "honya" could be misread as ho-nya (two morae, ほ・にゃ), a different rhythm entirely. The apostrophe protects the ん's independence. The same convention gives us kin'en (禁煙, "no smoking") versus kinen (記念, "commemoration"): the first has ん + え; the second is a clean ki-ne-n.

ん vs ン: the shape trap

In hiragana the moraic nasal is ん; in katakana it is ン. The katakana form is notorious because it looks almost identical to three other characters:

ン (n) vs ソ (so) — nearly the same two strokes;
シ (shi) vs ツ (tsu) — another lookalike pair.

The reliable distinction is stroke direction, which you cannot see in printed type. As a rule of thumb: ン and シ have their short strokes low and sweep upward from the bottom-left; ソ and ツ start their strokes high and come down. In print, when the strokes look the same, fall back on context — a katakana word like コンピューター (konpyūtā, "computer") only makes sense with ン, never ソ.

このコンピューター、少し前から動きが遅い。

kono konpyūtā, sukoshi mae kara ugoki ga osoi

This computer has been running slowly for a while now.

Common mistakes

❌ にほん → 'nihon' を二拍で読む

ni-hon (two beats)

Incorrect — ん is its own beat; にほん is three morae, not two.

✅ にほん → 'ni-ho-n'（三拍）

ni-ho-n (three beats)

Correct — hold the final ん for a full mora.

❌ 'shimbun' と 'shinbun' は別の仮名だと思う

thinking shimbun and shinbun use different kana

Incorrect — both are the same ん; only the romaji differs.

✅ しんぶんは一つのん（音は [m]、綴りは shimbun/shinbun）

shinbun — one ん, m-sound before b

Correct — the m is just the assimilated sound of ん before b.

❌ んで始まる言葉を探す

looking for a word that starts with ん

Incorrect — no Japanese word begins with ん.

✅ んは必ず前の音にくっつく

ん always closes the preceding mora

Correct — ん can only close a mora, never open a word.

❌ ほんや → 'ho-nya' と読む

reading 本屋 as ho-nya

Incorrect — the ん is its own mora: hon-ya, not ho-nya.

✅ ほんや → 'hon-ya'（ho-n-ya）

hon'ya

Correct — ん stands alone as a beat, so it is ho-n-ya.

❌ カタカナのンとソを取り違える

confusing ン (n) with ソ (so)

Incorrect — ン (n) and ソ (so) are different kana despite looking alike.

✅ 文脈で判断（例：コンピューターはン）

use context: コンピューター has ン

Correct — when the printed shapes look the same, context decides.

Key takeaways

ん is a full mora — にほん is three beats — and a standalone nasal consonant with no vowel.
It never begins a word; it always closes the preceding mora (hence the しりとり rule).
Its sound assimilates to what follows — [m] before b/p/m, [ŋ] before k/g, [n] before t/d/n, uvular [ɴ] elsewhere — but it is always written ん.
Romaji m before b/p/m (Shimbun, tempura) is the same ん; so is the apostrophe form (hon'ya).
Katakana ン is easily confused with ソ (and シ with ツ); rely on stroke direction and context.

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