Why are counters (助数詞) necessary to describe the numerical quantity of objects in Japanese?

I'm interested in the linguistic explanation specifically, but also curious as to how strict those who are fluent tend to be about it in colloquial conversation.

  • 3
    We do have counters in English, too, although we don't have as many of them and native speakers aren't as aware of them as "counters", per se. One everyday example: why do we say "a pair of pants"? (Historically, I get that "pants" a.k.a. "trousers" weren't joined in the middle, so you had one piece for each leg. But nowadays, it's just an odd leftover relic. :) ) Aug 29, 2016 at 22:39
  • Why are counters necessary>> 助数詞がなかったら、「 3歩歩いて2歩下がる」「 何名様ですか -- 3人です」とかが使えないし、「 一口ちょうだい」「 一個ちょうだい」「 一切れちょうだい」「 一杯ちょうだい」とかの違いがわからないし、「 第一球投げました!」「なにか一枚羽織りなさい」「 一発やらせろ!」とか言うときに困るからですかね・・。あと、「尾、丁、さく、切れ」とかがないと、マグロも数えられないし不便ですよね・・・。
    – chocolate
    Aug 30, 2016 at 14:49
  • I wrote articles about it, if you please. (1) lang-8.com/1258954/journals/… (2)lang-8.com/1258954/journals/…
    – user4092
    Aug 31, 2016 at 4:28

3 Answers 3


Counters aren't necessary any more in Japanese than gendered nouns are in romance languages, e.g. la vache vs. le chat.

English has something extremely similar to counters called Collective Nouns. When you see several fish, you call it a "school of fish". You wouldn't say a "school of wolves", you'd say a "pack of wolves".

Are these necessary? Anyone could just say a "group of fish/wolves", but it simply wouldn't sound right to our ears. That's the same way it works in Japanese, to say 一枚のペン simply wouldn't sound right, even though you could easily say 一つのペン.

  • 2
    Then there are the odd ones: a ministry of crows, a lunacy of werewolves, and my personal favorite, an itself of Yahwehs. (For the latter two, see wondermark.com/566) Aug 30, 2016 at 1:12
  • 2
    I suppose there might be cases where 一枚のペン would work. :) Aug 30, 2016 at 1:19
  • 3
    I don't think counters are that much like collective nouns (which are often just made up things no one would even say, anyway), they are more like "one sheet of paper" or "three slices of pizza/cake/pie".
    – Paul
    Aug 30, 2016 at 3:42
  • 2
    @Paul, some of the obscure collective nouns are indeed variable and bordering on made-up. However, many collective nouns are used extensively: a flock of birds, a school of fish, a pack of dogs, an oppressiveness of politicians. (Well, maybe not that last one. :) ) Aug 30, 2016 at 7:40
  • 1
    @Paul, yes English does have a few counters but I don't like to use those as examples cause they are few and far between, you can also naturally replace your examples with a "piece" of paper/pie/cake/pizza/etc. Native English speakers usually remark that not using the right collective noun "sounds wrong", which is analogous to what I've heard from native Japanese speakers in regards to counters. It's always been my go-to analogy when explaining counters to an English speaker.
    – bcloutier
    Aug 30, 2016 at 13:02

Counter words are not necessary, but many languages do use them. My favourite counter in English for illustrative purposes is "sheet(s)", as in "two sheets of paper". With other counters like "two bottles of beer", you can sometimes get away with "two beers", but "two papers" doesn't mean "two sheets of paper" (although it can now mean "two publications").

While in English counter words ("classifiers") are usually only used for mass nouns (i.e. things where it is unclear what "one [thing]" is), in Japanese counting items/people/days/etc. is always done using Japanese counter words. (One could say that Japanese has no count nouns, so that all nouns are mass nouns/non-count nouns.)

There is some level of flexibility in what counter to choose for which item. For checking which counter to use, one can consult 数え方の辞典, which gives explanatory notes to each counter, e.g.






Just like we have to use a counter for paper in English. Roughly corresponding to the above, we have

a sheet of paper, a scrap of paper, a piece of paper, a roll of paper

a ream of paper, one quire of paper, one bale of paper, etc.


Adding to @bcioutier's great answer, it is somewhat wrong to assume there are counters only in Japanese or there are no counters in English as @Eiríkr Útlendi commented. I am not saying you are assuming so.

English uses a couple to indicate two. And there are a half a dozen to mean six, a dozen for twelve, a score for 20, a gross (12 dozens) for 144, etc.

There are also special words for people using prefixes for each number.

Soloist, duet, trio, quartet, quintet, sextet, septet, octet.

Your question,

Why are counters (助数詞) necessary to describe the numerical quantity of objects in Japanese?

Japanese needs counters to describe quantity of objects, some are complicated, some are not. But that's the way the language has evolved for thousands of years as English has on its own way. If someone asks why English uses duet and trio instead of just 'two people' and 'three people', you will answer because they have specific meaning to indicate the number of people in music or entertainment.

how strict those who are fluent tend to be about it in colloquial conversation.

It will depend on each native speaker. There are some counters which are strictly followed and some are not.

For more information, you can read the link on Words for numbers in English and Japanese counter word.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .