In Japanese, you add a small word called a counter after the number; this guide explains the key rules for counting and common pitfalls to avoid.
English just puts a number in front of a noun: three books, two people, five apples. Japanese works differently. You take a number, then add a small word that tells the listener what kind of thing you’re counting. That small word is called a counter — and critically, the counter changes depending on what you’re counting. People take one counter, money takes another, everyday objects take yet another. There are dozens in total, but a handful cover most of daily life.
Three starter counters go a long way:
So “three people” is san-nin (三人), “three yen” is san-en (三円), and “three (general items)” is mittsu (三つ). Same quantity, different counter.
Before we count things, here are the base numbers. Try to recognize them in hiragana as you read along:
| Number | Hiragana | Romaji | Kanji |
|---|---|---|---|
| 1 | いち | ichi | 一 |
| 2 | に | ni | 二 |
| 3 | さん | san | 三 |
| 4 | よん / し | yon / shi | 四 |
| 5 | ご | go | 五 |
| 6 | ろく | roku | 六 |
| 7 | なな / しち | nana / shichi | 七 |
| 8 | はち | hachi | 八 |
| 9 | きゅう / く | kyuu / ku | 九 |
| 10 | じゅう | juu | 十 |
People are the most common thing you’ll count. The counter is にん (nin), but 1 and 2 are special:
| How many | Hiragana | Romaji | Kanji |
|---|---|---|---|
| 1 person | ひとり | hitori | 一人 |
| 2 people | ふたり | futari | 二人 |
| 3 people | さんにん | san-nin | 三人 |
| 4 people | よにん | yo-nin | 四人 |
| 5 people | ごにん | go-nin | 五人 |
| 6 people | ろくにん | roku-nin | 六人 |
| 7 people | ななにん / しちにん | nana-nin / shichi-nin | 七人 |
| 8 people | はちにん | hachi-nin | 八人 |
| 9 people | きゅうにん | kyuu-nin | 九人 |
| 10 people | じゅうにん | juu-nin | 十人 |
Why hitori and futari? Japanese has two sets of numbers: the ichi-ni-san set (borrowed from Chinese, used for most counting) and an older native Japanese set (which you’ll meet in the 〜つ section below). For “one person” and “two people,” the native set is used instead of the Chinese set. So “one person” comes from ひと (hito, the old word for one) plus a shortened ending, giving hitori. Same story for futari.
From 3 onward, it’s regular: just number + nin. The only other thing to notice is that 4 people is yo-nin, not yon-nin — the n at the end of yon drops before nin to avoid a double n.
Good news: yen is almost completely regular. The counter is えん (en, which means “yen”), and because it starts with a vowel, the hard-consonant problem never happens.
| How much | Hiragana | Romaji | Kanji |
|---|---|---|---|
| 1 yen | いちえん | ichi-en | 一円 |
| 5 yen | ごえん | go-en | 五円 |
| 10 yen | じゅうえん | juu-en | 十円 |
| 100 yen | ひゃくえん | hyaku-en | 百円 |
| 1,000 yen | せんえん | sen-en | 千円 |
| 10,000 yen | いちまんえん | ichi-man-en | 一万円 |
The one wrinkle: there is no short word for 1,000 — it’s just sen (not ichi-sen). But 10,000 does take ichi in front: ichi-man. You’ll run into these constantly on price tags in Japan.
For everyday objects of almost any kind — apples, boxes, questions, ideas — the first counter to learn is 〜つ. It uses the older native Japanese number set (hitotsu, futatsu, mittsu…) and it’s the safest choice whenever you don’t know a more specific counter. There’s one catch: it only works from 1 to 10.
| How many | Hiragana | Romaji | Kanji |
|---|---|---|---|
| 1 | ひとつ | hitotsu | 一つ |
| 2 | ふたつ | futatsu | 二つ |
| 3 | みっつ | mittsu | 三つ |
| 4 | よっつ | yottsu | 四つ |
| 5 | いつつ | itsutsu | 五つ |
| 6 | むっつ | muttsu | 六つ |
| 7 | ななつ | nanatsu | 七つ |
| 8 | やっつ | yattsu | 八つ |
| 9 | ここのつ | kokonotsu | 九つ |
| 10 | とお | too (no 〜つ) | 十 |
Notice two quirks:
Because the shape of 〜つ never changes no matter what you attach it to, it’s the easiest counter for a beginner to get right. “Hitotsu kudasai” (一つください — “one, please”) and “futatsu arimasu” (二つあります — “there are two”) will carry you through most daily situations.
Once 〜つ feels comfortable, the next counter to pick up is 〜個 (ko). It overlaps with 〜つ, but it implies a small, discrete, physical object — an apple, an egg, a battery, a piece of candy. In shops (“three of these, please”) and recipes 〜個 often sounds more natural than 〜つ, and unlike 〜つ it works for any quantity, not just 1–10.
The trade-off: 〜個 starts with a hard k sound. When numbers ending in a hard consonant (ichi, roku, hachi, juu — i.e. 1, 6, 8, 10) run into that k, Japanese smooths the awkward join by collapsing the ending into a short pause written っ, and the k doubles up. So 1, 6, 8, and 10 all change shape:
| How many | Hiragana | Romaji | Kanji |
|---|---|---|---|
| 1 object | いっこ | ikko | 一個 |
| 2 objects | にこ | ni-ko | 二個 |
| 3 objects | さんこ | san-ko | 三個 |
| 4 objects | よんこ | yon-ko | 四個 |
| 5 objects | ごこ | go-ko | 五個 |
| 6 objects | ろっこ | rokko | 六個 |
| 7 objects | ななこ | nana-ko | 七個 |
| 8 objects | はっこ | hakko | 八個 |
| 9 objects | きゅうこ | kyuu-ko | 九個 |
| 10 objects | じゅっこ | jukko | 十個 |
Look at the bolded rows — all of them follow the same pattern. The hard ending (-chi, -ku) collapses into a short pause written as っ, and then the k of ko doubles up: ichi + ko → ik-ko, roku + ko → rok-ko, hachi + ko → hak-ko.
A pronunciation note on 10個: You may run into older textbooks that give the reading as jikko (じっこ). In modern spoken Japanese that sounds archaic — the standard reading today is jukko (じゅっこ). Stick with jukko; native speakers almost always do.
If you remember just one thing from this article, remember this:
Counters are one of those topics that feels overwhelming on paper but gets easy with a bit of real exposure. A few suggestions:
That’s the whole system. The irregularities aren’t random — they’re the language quietly smoothing out sounds that are awkward to say back-to-back.
A few beginner-friendly walkthroughs worth bookmarking. Hearing the sound changes spoken out loud makes the っ pauses click much faster than reading tables alone — once your ear catches them, counters stop feeling like memorization.