Japanese Counters Cheat Sheet
In Japanese, you cannot just say "three dogs" or "five books." You need a counter word between the number and the noun that categorizes the object by its shape, size, or type. This system confuses every beginner, but the core counters you actually need for daily life number fewer than fifteen. Here is your cheat sheet.
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The General Counter: つ (tsu)
The つ counter uses native Japanese numbers and works for almost any object in casual speech. It only goes up to ten, but it is your lifeline when you cannot remember the specific counter.
When in doubt, use the —つ counter. Native speakers may smile, but they will always understand you. It is far better than freezing up trying to remember the perfect counter.
Essential Counters by Category
個 (ko) — Small Objects and General Items
The most versatile Sino-Japanese counter. Use it for small, compact objects like apples, eggs, boxes, and bags.
- リンゴ三個 (ringo sanko) — three apples
- 卵二個 (tamago niko) — two eggs
枚 (mai) — Flat, Thin Objects
Use for paper, tickets, shirts, plates, slices, photos — anything flat.
- 紙五枚 (kami gomai) — five sheets of paper
- 写真三枚 (shashin sanmai) — three photos
本 (hon) — Long, Cylindrical Objects
Use for bottles, pens, pencils, trees, umbrellas, rivers, and roads. This counter has notable sound changes.
- ペン一本 (pen ippon) — one pen (not ichihon)
- 傷三本 (kasa sanbon) — three umbrellas (not sanhon)
- 瓶六本 (bin roppon) — six bottles (not rokuhon)
Sound changes for 本: 1 = ippon, 3 = sanbon, 6 = roppon, 8 = happon, 10 = juppon. Numbers 2, 4, 5, 7, 9 keep the regular "hon" reading. These same patterns apply to many counters starting with h-.
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匹 (hiki) — Small and Medium Animals
Use for cats, dogs, fish, insects, and most animals that are not large.
- 猫一匹 (neko ippiki) — one cat
- 犬三匹 (inu sanbiki) — three dogs
頭 (tō) — Large Animals
Use for horses, cows, elephants, and other large animals.
- 馬二頭 (uma nitō) — two horses
冊 (satsu) — Books and Bound Volumes
- 本一冊 (hon issatsu) — one book
- 雑誌三冊 (zasshi sansatsu) — three magazines
台 (dai) — Machines and Vehicles
- 車一台 (kuruma ichidai) — one car
- パソコン二台 (pasokon nidai) — two computers
杯 (hai) — Cups and Glasses
- コーヒー一杯 (kōhī ippai) — one cup of coffee
- ビール三杯 (bīru sanbai) — three beers
人 (nin) — People
- 一人 (hitori) — one person (irregular)
- 二人 (futari) — two people (irregular)
- 三人 (sannin) — three people
- 四人 (yonin) — four people
Sound Change Patterns
Counters beginning with h undergo predictable sound changes with certain numbers:
- Numbers 1, 6, 8, 10: h → pp (ippon, roppon, happon, juppon)
- Number 3: h → b (sanbon, sanbai, sanbiki)
- Other numbers: no change (nihon, yonhon, gohon)
Counters beginning with k or s can double after 1 and sometimes 8 and 10: 一冊 (issatsu), 一個 (ikko).
Frequently Asked Questions
Why does Japanese have counter words?
Japanese counters classify nouns by shape, size, or type, similar to how English uses "a sheet of paper" or "a head of cattle." The system exists because Japanese nouns do not have plural forms, so counters help specify quantity and categorize objects. Chinese, Korean, and Thai have similar systems.
How many Japanese counters do I need to know?
Japanese has over 500 counters, but you only need about 10-15 for daily conversation. The general counter —つ (tsu) covers most situations informally. Add 個 (ko), 枚 (mai), 本 (hon), 人 (nin), 匹 (hiki), and 台 (dai) and you can handle 90% of everyday counting.
What are the sound changes in Japanese counters?
Certain numbers cause the first consonant of the counter to change. The most common: 1, 6, 8, and 10 before counters starting with h/f become pp (一本 = ippon, not ichihon). 3 before h becomes b (三本 = sanbon). These changes follow consistent patterns once you learn them.
Can I just use the general counter for everything?
The つ (tsu) counter works for objects numbered 1-10 and is perfectly acceptable in casual speech. However, using the correct specific counter sounds more natural and educated. For people (人) and flat things (枚), using the specific counter is strongly expected even in casual situations.
What counter do you use for people?
Use 人 (nin) for people, but note the irregular readings: one person is 一人 (hitori), two people is 二人 (futari). From three onward, it follows the regular pattern: 三人 (sannin), 四人 (yonin), 五人 (gonin). Hitori and futari use native Japanese numbers, not Sino-Japanese.