Japanese Counters - The Complete Guide
When you count things in Japanese, you say number plus counter. The counter changes by category: five flat objects = 五枚 go-mai, five long objects = 五本 go-hon, five small animals = 五匹 go-hiki, five people = 五人 go-nin. Linguists count over 500 Japanese counters; learners need 12. This page is the index to those 12.
The 12 essential counters
| Counter | Romaji | JLPT | Used for | Detail |
|---|---|---|---|---|
| 人 | nin | N5 | People. The first two are irregular: hitori (1 person) and futari (2 people). | people |
| 本 | hon | N5 | Long, thin objects: pencils, bottles, umbrellas, trees, neckties, even trains. | objects |
| 枚 | mai | N5 | Flat, thin objects: paper, plates, T-shirts, tickets, photos, cards. | objects |
| 個 | ko | N5 | Small, compact objects: apples, eggs, balls, batteries. The general fallback for objects. | objects |
| 匹 | hiki | N5 | Small to medium animals: cats, dogs, fish, mice, insects, octopuses. | animals |
| 頭 | tō | N4 | Large animals: horses, cattle, elephants, whales, lions. Roughly human-sized or larger. | animals |
| 羽 | wa | N4 | Birds (and rabbits, by historical convention). | animals |
| 時 | ji | N5 | O’clock (the hour). Note 4, 7, 9 keep their older readings here: yo-ji, shichi-ji, ku-ji. | time |
| 分 | fun / pun | N5 | Minutes. Heavy sound changes; 1, 3, 4, 6, 8, 10 take pun. | time |
| 回 | kai | N4 | Times / occurrences (how many times something happened). | time |
| 歳 | sai | N5 | Age in years. Irregular at 1, 8, 10, 20. | ages |
| 円 | en | N5 | Yen. Almost no sound changes; en stays en. | prices |
Counter picker
Type an English noun. The picker returns the right counter, an example sentence, and a link to the relevant counter page. Backed by a hand-built dataset of common nouns mapped to their canonical counters; sourced to Tofugu and Genki.
The 〜つ general counter
Before specific counters existed, native Japanese counted with 〜つ: hitotsu, futatsu, mittsu. The 〜つ counter still works as a general-purpose fallback for objects 1 to 10. It is the safe default when you do not know the specific counter for an object. After 10, switch to a specific counter or to 〜個 (ko). Detailed coverage at /native-numbers.
Sound changes that recur across counters
A handful of patterns recur in nearly every counter:
- 1, 6, 8, 10 trigger gemination: ip-pon (1本), rop-pon (6本), hap-pon (8本), jup-pon (10本). Same family for 〜匹 (ip-piki, rop-piki, hap-piki, jup-piki) and 〜回 (ik-kai, rok-kai, hak-kai, juk-kai).
- 3 triggers rendaku in some counters: san-byaku (300), san-bon (3本), san-biki (3匹), san-zen (3000).
- 4 and 7 prefer yon and nana: across most counters and prices; reverts to shi/shichi only in time, months, and frozen idioms.
Counter family pages
- People: 人 nin, plus the irregulars hitori and futari
- Objects: 枚 mai (flat), 本 hon (long), 個 ko (small)
- Animals: 匹 hiki (small), 頭 tō (large), 羽 wa (birds)
- Time: 時 ji (hours), 分 fun/pun (minutes), 回 kai (occurrences)
Frequently asked questions
How many Japanese counters are there?
Linguists count over 500 counter words in total. Native speakers actively use 30 to 50. Learners need to know about 12 to handle most everyday situations. Tofugu has documented around 350 counters in their reference series, including obscure ones for boats (艘 sō), buildings (棟 mune), and rank levels (段 dan).
What is the most useful Japanese counter?
For learners, 〜つ (the native general counter) and 〜個 (ko, the Sino general counter) handle the most situations. After that, 〜人 (nin, people), 〜本 (hon, long thin objects), 〜枚 (mai, flat thin objects), and 〜匹 (hiki, small animals) cover most everyday categories. The 12 essential counters on this page handle around 80% of daily use.
What if I use the wrong counter?
You will be understood. Native speakers may gently correct you, especially for common errors like using 〜本 for an apple instead of 〜個. Mistakes are not embarrassing; they are evidence you are practising. The "fallback" 〜つ (1 to 10) and 〜個 (any number) are accepted broadly when the specific counter does not come to mind.
Do I need to learn the sound-changes for every counter?
The 1, 6, 8, 10 family sound-change pattern (gemination: ip-pon, rop-pon, hap-pon, jup-pon) and the 3 rendaku (san-bon, san-byaku) cover most cases. Counter-by-counter the details vary: 〜本 takes -pon at 1/6/8/10, 〜分 takes -pun at 1/3/4/6/8/10, 〜回 takes -kkai at 1/6/8/10. Tofugu has the cleanest per-counter tables.
How do I count people in Japanese?
The standard counter is 人 (nin), with two irregulars at the start: 一人 hitori (1 person), 二人 futari (2 people). From 3 onwards: san-nin, yo-nin (yo, not yon), go-nin, roku-nin, shichi-nin or nana-nin, hachi-nin, kyū-nin, jū-nin. See /counters/people for the full breakdown.
Tofugu’s per-counter pages are excellent for individual deep-dives. This site is the parent hub.