Japanese Counters: The Complete Counter Words Guide (with Charts)

What Japanese Counters Are

In Japanese you cannot simply attach a number to a noun. To count things, you use a counter word (助数詞, josūshi) that matches the type of object — its shape, size, or category. It is similar to English "two sheets of paper" or "three cups of coffee," except Japanese does this for almost everything.

The pattern is number + counter: 三枚 (san-mai, three flat things), 二人 (futari, two people), 五本 (go-hon, five long things). The tricky part is not the concept — it is that the reading of the counter often changes depending on the number in front of it. This guide gives you the full charts and the rules behind those changes.

Start Here: The ～つ Fallback Counter

Before memorizing every counter, learn the native Japanese ～つ series. It counts general objects and works as a fallback whenever you are unsure which specific counter to use. The catch: it only goes up to とお (10).

The native ～つ counter (universal fallback, 1–10)

1	2	3	4	5	6	7	8	9	10
ひとつ	ふたつ	みっつ	よっつ	いつつ	むっつ	ななつ	やっつ	ここのつ	とお
hitotsu	futatsu	mittsu	yottsu	itsutsu	muttsu	nanatsu	yattsu	kokonotsu	tō

Works for most physical objects but stops at とお (10). When you forget the specific counter, this is the safe choice.

The Essential Counter Chart (1–10)

These are the counters you meet first — the N5 core plus a few high-frequency N4 counters. Read down each row to see how the reading shifts across the numbers. The red cells are the irregular readings worth drilling.

Counter chart 1–10 (core N5 + frequent N4)

Counter	Counts	JLPT	1	2	3	4	5	6	7	8	9	10
人nin	people	N5	ひとり	ふたり	さんにん	よにん	ごにん	ろくにん	しちにん・ななにん	はちにん	きゅうにん	じゅうにん
個ko	small / general objects	N5	いっこ	にこ	さんこ	よんこ	ごこ	ろっこ	ななこ	はっこ	きゅうこ	じゅっこ
枚mai	flat things (paper, tickets, shirts)	N5	いちまい	にまい	さんまい	よんまい	ごまい	ろくまい	ななまい	はちまい	きゅうまい	じゅうまい
本hon	long, thin things (pens, bottles, umbrellas)	N5	いっぽん	にほん	さんぼん	よんほん	ごほん	ろっぽん	ななほん	はっぽん	きゅうほん	じゅっぽん
匹hiki	small animals (cats, dogs, fish, insects)	N5	いっぴき	にひき	さんびき	よんひき	ごひき	ろっぴき	ななひき	はっぴき	きゅうひき	じゅっぴき
杯hai	cups, glasses, bowls of liquid	N5	いっぱい	にはい	さんばい	よんはい	ごはい	ろっぱい	ななはい	はっぱい	きゅうはい	じゅっぱい
冊satsu	bound volumes (books, magazines, notebooks)	N5	いっさつ	にさつ	さんさつ	よんさつ	ごさつ	ろくさつ	ななさつ	はっさつ	きゅうさつ	じゅっさつ
台dai	machines & vehicles (cars, computers, TVs)	N5	いちだい	にだい	さんだい	よんだい	ごだい	ろくだい	ななだい	はちだい	きゅうだい	じゅうだい
回kai	times / occurrences	N4	いっかい	にかい	さんかい	よんかい	ごかい	ろっかい	ななかい	はっかい	きゅうかい	じゅっかい
階kai	floors of a building	N4	いっかい	にかい	さんがい	よんかい	ごかい	ろっかい	ななかい	はっかい	きゅうかい	じゅっかい
歳sai	age (years old)	N4	いっさい	にさい	さんさい	よんさい	ごさい	ろくさい	ななさい	はっさい	きゅうさい	じゅっさい
番ban	order / rank (No. 1, No. 2)	N4	いちばん	にばん	さんばん	よんばん	ごばん	ろくばん	ななばん	はちばん	きゅうばん	じゅうばん

Red = irregular reading / sound change — exactly what the JLPT tests. Full rules: Counter Sound Changes guide →

Counting People with 人

People are counted with 人 (nin), but the first two numbers are irregular and must be memorized:

1 person

一人

ひとり (hitori)

2 people

二人

ふたり (futari)

3 people

三人

さんにん (san-nin)

4 people

四人

よにん (yo-nin)

From 三人 onward it is regular (number + にん), with one thing to watch: 4 is よにん, not よんにん.

The Sound-Change Rules (JLPT gold)

1・6・8・10 → 促音（small っ）

Counters starting with h-, k-, s-, p- often double the consonant after 1, 6, 8, 10: 一本いっぽん, 六匹ろっぴき, 八冊はっさつ, 十回じゅっかい.

h- counters → p / b after certain numbers

本 (hon), 匹 (hiki), 杯 (hai) shift the h- to p- or b-: 一本いっぽん, 三本さんぼん, 三杯さんばい, 三匹さんびき.

3 → 連濁 (voicing)

After 三 (san), some counters voice their first sound: 三本さんぼん, 三匹さんびき, 三階さんがい, 三杯さんばい.

4・7・9 → prefer よ／なな／きゅう

With counters, 4 is usually よ／よん (not し), 7 is なな (not しち), 9 is きゅう (not く): 四人よにん, 七回ななかい, 九本きゅうほん.

Do not try to memorize every cell in isolation. Learn the 1/6/8/10 doubling pattern and the 3-voicing pattern first — they explain most of the "irregular" readings at once. The full breakdown is in our Counter Sound Changes guide.

Choosing the Right Counter

Match the counter to the object's shape or category:

Long and thin (pens, bottles, umbrellas)本 (hon)
Flat and thin (paper, tickets, shirts)枚 (mai)
People人 (nin)
Small animals (cats, dogs, fish)匹 (hiki)
Machines and vehicles台 (dai)
Bound volumes (books, notebooks)冊 (satsu)
Cups / glasses of liquid杯 (hai)
Anything, when unsure (up to 10)～つ or 個 (ko)

When two counters could fit, the more specific one sounds more natural — but native speakers will always understand ～つ or 個, so never let uncertainty stop you from speaking.

Frequently Asked Questions

What are Japanese counters?+

Japanese counters (助数詞, josūshi) are small words attached to a number to count specific kinds of things — like 人 for people, 本 for long thin objects, and 枚 for flat objects. You cannot just say a number alone; Japanese pairs the number with a counter that matches the shape or category of what you are counting, similar to saying "two sheets of paper" or "three head of cattle" in English.

How do you count people in Japanese?+

People are counted with 人 (nin), but 1 and 2 are irregular: 一人 (ひとり, hitori) for one person and 二人 (ふたり, futari) for two people. From three onward it becomes regular: 三人 (さんにん), 四人 (よにん), 五人 (ごにん). Note 4 is よにん, not よんにん.

Which counter should I use if I don't know the right one?+

Use the native ～つ counter (ひとつ, ふたつ, みっつ …). It works for most physical objects up to ten and is the safe fallback when you are unsure. Native speakers understand it perfectly, so it is a great beginner strategy — just remember it only goes up to とお (10).

Why do counter readings change (like 一本 → いっぽん)?+

The sounds change for ease of pronunciation. After 1, 6, 8, and 10, many counters take a small っ (いっぽん, ろっぽん), and after 3 some counters voice their first sound (三本 → さんぼん). These sound changes are heavily tested on the JLPT — see our Counter Sound Changes guide for the full rules.

How many Japanese counters are there?+

There are hundreds of counters in total, but you only need a couple dozen for daily life and the JLPT. Master the core set (人, 個, 枚, 本, 匹, 杯, 冊, 台) plus the native ～つ counter first, then add frequent ones like 回, 階, 歳, and 番 as you reach N4.