counter-words

In Japanese, you cannot simply say “three cat” or “two book” the way some languages allow. Japanese uses counter words (助数詞, じょすうし, josuushi) — special suffixes that attach to numbers depending on what you are counting. The shape, nature, and category of the object determines which counter to use. This guide covers the most essential counters with full conjugation tables, real example sentences, and a quiz at the end.

At a Glance: The Most Common Japanese Counters

Native Japanese Counting: ひとつ, ふたつ… (The Universal Counter)

Before learning all the specific counters, it helps to know the native Japanese counting system. These words (1–10) can be used for almost any object when you are unsure which counter to use — making them a safe fallback for beginners.

Note: This system only works for 1–10. For 11 and above, use the Sino-Japanese counters (ko, mai, hon, etc.).

Counters for People: 人 (nin/ri) and 名 (mei)

Two counters exist for counting people. The difference lies in formality and context.

Key distinction: 人 (nin) is used in everyday situations. 名 (mei) is formal — used in restaurants, hotels, and professional contexts.

三人で行きます。
San nin de ikimasu.
We will go as a group of three. (casual, everyday)

予約は2名様でよろしいですか？
Yoyaku wa ni-mei-sama de yoroshii desu ka?
Is the reservation for two people? (formal restaurant/hotel language)

Counters for Objects: 個 (ko), 枚 (mai), and 本 (hon)

These three counters cover a large portion of everyday objects. Choosing between them comes down to the shape of what you are counting.

本 (hon) has irregular readings — one of the trickiest counters for beginners:

ペンを3本買いました。
Pen o san-bon kaimashita.
I bought three pens.

シャツを2枚持っています。
Shatsu o ni-mai motte imasu.
I have two shirts.

Counters for Animals: 匹 (hiki) and 羽 (wa)

Animals are counted differently depending on their type. Most small and medium animals use 匹 (hiki), while birds — and surprisingly, rabbits — use 羽 (wa, meaning “feather/wing”).

猫が3匹います。
Neko ga san-biki imasu.
There are three cats.

Note: Large animals (elephants, horses, cows) use the counter 頭 (とう, tou), which is not covered here but worth knowing for JLPT N3 and above.

Counters for Buildings and Frequency: 階 (kai) and 回 (kai)

Two counters share the same romaji reading (kai) but use different kanji. Context always makes the meaning clear.

私のオフィスは5階です。
Watashi no ofisu wa go-kai desu.
My office is on the 5th floor.

私は1日に3回、食事をします。
Watashi wa ichi-nichi ni san-kai, shokuji o shimasu.
I eat three times a day.

Decision Flowchart: Which Counter Do I Use?

Are you counting a PERSON?
  └─ Yes, general context (friends, family, etc.)  → 人 (nin/ri)
  └─ Yes, formal context (restaurant, hotel, etc.) → 名 (mei)

Are you counting an ANIMAL?
  └─ Bird or rabbit → 羽 (wa)
  └─ Small/medium animal (dog, cat, fish…) → 匹 (hiki)
  └─ Large animal (horse, cow…) → 頭 (tou)

Are you counting an OBJECT?
  └─ Small, compact (egg, apple, cup…) → 個 (ko)
  └─ Flat/thin (paper, shirt, ticket…) → 枚 (mai)
  └─ Long/cylindrical (pen, bottle, river…) → 本 (hon)
  └─ Bound book (book, notebook…) → 冊 (satsu)
  └─ Machine/vehicle (car, TV, bike…) → 台 (dai)

Are you counting SOMETHING ELSE?
  └─ A floor in a building → 階 (kai)
  └─ Number of times → 回 (kai)
  └─ A dish/serving of food → 皿 (sara)
  └─ Unsure / anything 1–10 → Use native counting: ひとつ, ふたつ…

Quick Quiz — Choose the Right Counter

Fill in the correct counter for each sentence.

1. りんごを3___食べました。(I ate three apples.)
2. 猫が2___います。(There are two cats.)
3. 本を5___借りました。(I borrowed five books.)
4. 映画を1___見ました。(I watched one movie.)
5. このビルは10___です。(This building has 10 floors.)

Answers:

1. 個 (こ) → さんこ (san ko) — Apples are small, compact objects.
2. 匹 (ひき) → にひき (ni hiki) — Cats are small animals (not birds/rabbits).
3. 冊 (さつ) → ごさつ (go satsu) — Books use 冊, not 本 (which is for long objects).
4. 本 (ほん) → いっぽん (ippon) — Films/movies use 本 (long ribbon of film). Note the irregular: 1本 = ippon.
5. 階 (かい) → じゅっかい (jukkai) — Building floors use 階.

Summary: Counter Word Quick Reference

Counter words are one of the more challenging aspects of Japanese, but they also reveal a lot about how Japanese culture categorizes the world. With regular practice — counting things around you in daily life — these become second nature. Start with 個, 枚, 本, and 人, then expand from there.

Want to keep building your number skills? See also:

あわせて読みたい

count-in-japanese-numbers Test. https://jpyokoso.com/counter-words/ https://jpyokoso.com/introduce-yourself-in-japanese/

あわせて読みたい

A Guide to Japanese Particles: Wa, Ni, Ga, Wo and More! Japanese particles like は, が, に, を, で, and と are tiny words that carry huge meaning. This complete guide explains each particle with examples, a comparison chart, a decision flowchart, and a quick quiz — perfect for N5–N3 learners.