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人 / 名 (Nin/Mei) Counter: Counting People in Japanese

The 人 counter is what Japanese learners use to count people. It is a numeral classifier (助数詞, josūshi): a measure word attached to a number, because Japanese numbers cannot quantify nouns on their own.1 From three upward, 人 is read にん. At one and two, it breaks the pattern in a way no object counter does, which is why it earns its own page.

Overview​

人 counts people. From three up, it behaves predictably as 数字 (number) + にん. At one and two, it does something neither 枚 nor 本 does: it swaps in whole native words.123

The core fact: 人 counts people, but not like 枚 or 本​

As a counter suffix, 人 is read にん, a Sino-Japanese (on'yomi) reading, from three upward: 三人 さんにん, 五人 ごにん, 六人 ろくにん.14

The two lowest values break this pattern. 一人 is read ひとり, and 二人 is read ふたり. Both use native Japanese (和語, wago) words rather than the expected 数字 + にん.123

This is a different kind of irregularity from the sound changes in object counters such as 本. 人 substitutes whole native words at one and two; 本 keeps one underlying reading and merely changes its sound.1

Where 人 sits among the counters you already know​

A regular object counter such as 枚 (for flat things) keeps one reading across every number. A sound-changing counter such as 本 keeps one reading but alters its onset or voicing for euphony.1

人 is irregular for a third, separate reason. At one and two it does not use the Sino-Japanese number plus counter at all; it borrows the native count words ひとり and ふたり wholesale.23

Three different reasons a counter can be irregular

枚 is fully regular, 本 changes its sound for euphony, and 人 substitutes native words at one and two. Keeping these three behaviours separate is the single most useful takeaway from this article.1

How to read 人 with each number​

The 1–10 and "how many" reading table​

The table below gives every reading from one to ten, plus the question form 何人. Readings are shown in kana, so furigana is not repeated here.

NumberFormReadingRomajiNotes
1一人ひとりhitorinative (和語) reading; suppletive2
2二人ふたりfutarinative (和語) reading; suppletive3
3三人さんにんsan-ninregular 数字 + にん1
4四人よにんyo-ninnative よ-stem + にん; not *よんにん, not *しにん15
5五人ごにんgo-ninregular1
6六人ろくにんroku-ninregular1
7七人しちにん / ななにんshichi-nin / nana-nintwo accepted readings15
8八人はちにんhachi-ninregular1
9九人きゅうにん / くにんkyū-nin / ku-nintwo accepted readings; きゅうにん is the everyday choice15
10十人じゅうにんjū-ninregular1
?何人なんにんnan-nin"how many people"16

Everything from three up is mechanically 数字 + にん. Only 一人 and 二人 are the native-reading exceptions.123

The question form 何人 (なんにん) asks "how many people" in everyday speech.

何人なんにんですか。6
"How many people?"

Why 一人 is ひとり and 二人 is ふたり (suppletive, not euphonic)​

一人 ひとり comes from 一 (ひと, native "one") plus 人 (り, the native counter for persons). This is a kun'yomi / native reading inherited from Old Japanese.2 二人 ふたり follows the same pattern: 二 (ふた, native "two") plus 人 (り).3

ひと and ふた belong to the indigenous native count series ひと, ふた, み, よ, いつ, the same series seen in ひとつ・ふたつ・みっつ・よっつ・いつつ.57 This series is distinct from the Sino-Japanese いち・に・さん・し・ご borrowed later from Chinese.5

The mechanism here is suppletion: at one and two, a different native word replaces the expected 数字 + にん. It is not a sound change applied to an underlying にん. The details of euphonic gemination and voicing belong in the dedicated sound-change treatment. They are mentioned here only for comparison.

Furigana convention for ひとり and ふたり

Although the etymology is ひと + り, the furigana for these words is conventionally written as group ruby over the whole compound (一人 → ひとり), not split kanji-by-kanji.2

四人 is よにん: the よ-stem, not *よんにん or *しにん​

四人 is read よにん, using the native よ-stem before にん.15

The Sino-Japanese reading し is avoided because it sounds the same as 死 ("death"), so よ and よん are preferred over し for 四 generally.5 The full よん is the standalone form. The bound よ-stem is what appears before にん, following the same standalone-versus-compound distinction documented for the native number series.

Seven and nine each have two accepted readings: 七人 しちにん／ななにん and 九人 きゅうにん／くにん.15 From three up, the pattern stays productive and neutral. ひとり and ふたり are the only two values a learner must memorize as vocabulary.123

When to use 名 (めい) instead: the formal people counter​

名 is the formal head-count: restaurants, reservations, service​

名 (めい) is a polite counter for people. The same character 名 means "name," which is the etymological basis for its formal head-count use.18

It appears in formal and institutional head-counts: service-industry party-size confirmations, written reservation and attendee figures, and formal announcements of participant numbers.1 In register, 名 sounds more polite and institutional than the neutral 人.18

名 takes the regular readings (一名 いちめい, 二名 にめい)​

With 名, every value is 数字 + めい using regular Sino-Japanese readings: 一名 いちめい, 二名 にめい, 三名 さんめい, and so on.8

Because of this, the ひとり/ふたり exception disappears in the formal register. 名 has no native-word substitution at one and two.8 The practical payoff is counterintuitive: the formal counter is the fully regular one for counting people.

The 何名様 (なんめいさま) question form​

何名様 (なんめいさま) is the set phrase a host uses to ask party size. It adds the honorific suffix 様 to 何名.9 Contrast the neutral 何人 (なんにん), which you would use among friends or to report a plain count.16

「何名様なんめいさまですか」「３名さんめいです」9
"For how many?" "Three."

Nuance and usage contexts​

人 vs 名: neutral default vs formal head-count​

The decision rule is simple. 人 (にん) is the everyday neutral counter in any context. 名 (めい) is for formal and service head-counts, and for written reservation or attendee figures.18

You are never wrong using 人 in casual speech. Expect to hear 名 in hospitality settings, most often in the 何名様 form.189

How 人's irregularity differs from 本's​

本 keeps one underlying reading and changes its sound for euphony through gemination and voicing: いっぽん, さんぼん, ろっぽん.1 人 instead swaps in different native words at one and two: ひとり and ふたり. It uses the regular にん everywhere else.123

So the two counters are irregular for unrelated reasons: sound change in 本 versus word substitution in 人. The euphony details for 本 are covered in the sound-change treatment and the 本 counter's own article.

ひとり and ふたり beyond counting: "alone" and "the two of us"​

一人 ひとり doubles as a standalone word meaning "alone" or "by oneself," as in 一人で ("by oneself").2

一人ひとりで行いく。10
"I'll go alone."

二人 ふたり also means "the two of them," "the two of us," or "a couple," as in 二人で ("together, the two of us") and 二人とも ("both of them").3

二人ふたりで何なにしてたの？11
"What were you two doing?"

These are durable lexical facts, not a separate grammar point. The counting sense is the same word at work, as in the everyday count below.

妹いもうとが三人さんにんいる。12
"I have three younger sisters."

私わたしには三人さんにんの子供こどもがいる。13
"I have three children."

Good to know​

The first two are words, the rest are math​

Memorize ひとり (一人) and ふたり (二人) as vocabulary, because they are native words borrowed wholesale. From three on, the counter is mechanical 数字 + にん. The learning load splits cleanly into two items to memorize and one rule to apply.123

Avoiding wrong readings for 四人, 七人, and 九人​

A common error is reading 四人 as *しにん or *よんにん. The correct reading is よにん.

四人よにん
"four people"

四 takes the native よ-stem before にん. The Sino-Japanese し is avoided because it sounds like 死 ("death"), and よんにん is not the standard form here.15 For 七人 and 九人, both readings are accepted: しちにん／ななにん and きゅうにん／くにん. ななにん and きゅうにん are the safer everyday choices.15

Using 人 where a host would use 名​

In a restaurant or reservation context, the polite head-count counter is 名, as in 何名様ですか. Using 人 is grammatically fine but sounds less formal. Beginners should recognise 名 when it is directed at them and use it when writing reservation figures.189

ひと・ふた・よ are the old native count​

ひとり and ふたり preserve the indigenous native counting series ひと, ふた, み, よ, いつ. This series predates the Sino-Japanese いち・に・さん numbers borrowed from Chinese.2357 This is why the low, high-frequency person-counts kept their native forms while everything from three up took the borrowed にん.

See also​

References​

Footnotes​

  1. "Japanese counter word." Wikipedia. https://en.wikipedia.org/wiki/Japanese_counter_word ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15 ↩16 ↩17 ↩18 ↩19 ↩20 ↩21 ↩22 ↩23 ↩24 ↩25 ↩26 ↩27 ↩28 ↩29 ↩30 ↩31 ↩32

  2. "一人." Wiktionary. https://en.wiktionary.org/wiki/%E4%B8%80%E4%BA%BA ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12

  3. "二人." Wiktionary. https://en.wiktionary.org/wiki/%E4%BA%8C%E4%BA%BA ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11

  4. "人." Wiktionary. https://en.wiktionary.org/wiki/%E4%BA%BA ↩

  5. "Japanese numerals." Wikipedia. https://en.wikipedia.org/wiki/Japanese_numerals ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11

  6. Tatoeba sentence #187378. https://tatoeba.org/en/sentences/show/187378 ↩ ↩2 ↩3

  7. "一つ." Wiktionary. https://en.wikipedia.org/wiki/Japanese_numerals (native count series ひと・ふた・み・よ・いつ); see also https://en.wiktionary.org/wiki/%E4%B8%80%E3%81%A4 ↩ ↩2

  8. "名." Wiktionary. https://en.wiktionary.org/wiki/%E5%90%8D ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7

  9. Tatoeba sentence #74248 (Tanaka Corpus). https://tatoeba.org/en/sentences/show/74248 ↩ ↩2 ↩3 ↩4

  10. Tatoeba sentence #13223996. https://tatoeba.org/en/sentences/show/13223996 ↩

  11. Tatoeba sentence #11052135. https://tatoeba.org/en/sentences/show/11052135 ↩

  12. Tatoeba sentence #6705562. https://tatoeba.org/en/sentences/show/6705562 ↩

  13. Tatoeba sentence #10908756. https://tatoeba.org/en/sentences/show/10908756 ↩