Japanese Counters: The 10 Every Beginner Needs

What a counter is and how it works

In English some nouns already need a measure word: a sheet of paper, a cup of tea, a head of cattle. Japanese does this with almost everything. The counter, called 助数詞 (じょすうし) in Japanese, attaches directly to the number, and together they say how many of what kind of thing.

The usual pattern is noun, particle, then number plus counter: りんごを三個買いました (りんごを さんこ かいました, I bought three apples). You can also put the count before the noun with の, as in 三人の学生 (さんにんの がくせい, three students), which is common in writing. Questions use 何 (なん) with the counter: 何人 (なんにん, how many people), 何本 (なんぼん, how many long things).

Most counters use the Sino-Japanese numbers いち, に, さん, which are explained in Japanese numbers. In real text the number is often written with Arabic numerals, so you will see 3人 as often as 三人.

The 10 counters beginners need

Japanese has many counters, and reference lists include well over a hundred. These ten handle most of what you will count in daily life and in beginner textbooks:

本 is the classic example of a counter defined by shape rather than meaning: it covers pencils, bottles, bananas, trees, roads and even phone calls. 杯 counts the container's contents, so コーヒーを二杯 (にはい) is two cups of coffee, and いっぱい also has the everyday meaning of full or a lot. For animals, 匹 covers anything you could pick up or that is smaller than a person. Large animals such as cows and elephants use 頭 (とう), and birds traditionally use 羽 (わ).

つ and 人: the two irregular counters

つ uses the native Japanese numbers: 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, and とお for ten, which has no つ. It only goes up to ten. After that you just say the number, or switch to a specific counter like 個. The question word is いくつ, which is also used to ask someone's age, as in おいくつですか.

人 mixes both systems. One and two people are native words, ひとり and ふたり, usually written 一人 and 二人. From three on it is regular: さんにん, ごにん, じゅうにん. Four is よにん, not よんにん, and seven can be しちにん or ななにん. You will use 人 when describing your family, as in 四人家族です (よにんかぞくです, we are a family of four); the family in Japanese guide covers the words for each relative. These readings are a good example of how one kanji takes different readings depending on the word, the idea covered in onyomi vs kunyomi.

The sound changes, and the pattern behind them

The readings that trip learners up follow a pattern based on the first sound of the counter. The numbers that change are 1, 6, 8 and 10, plus 3 and 何 for some counters:

• Counters starting with h (本, 匹, 杯): 1, 6, 8 and 10 double the consonant and h becomes p: いっぽん, ろっぽん, はっぽん, じゅっぽん. After 3 and 何, h becomes b: さんぼん, なんぼん. The rest keep h: にほん, よんほん, ごほん.
• Counters starting with k (個, 回): 1, 6, 8 and 10 double the k: いっこ, ろっこ, はっこ, じゅっこ. The rest are regular: にこ, さんこ.
• Counters starting with s (冊): 1, 8 and 10 double the s: いっさつ, はっさつ, じゅっさつ. Six stays ろくさつ.
• Counters starting with m or d (枚, 台): no changes at all, which makes them the easiest: いちまい, はちまい, じゅうだい.

For 10, you will hear both じゅっ and じっ, as in じゅっぽん and じっぽん. じっ is the older, traditional reading, while じゅっ is now very common in everyday speech. Speakers also vary on 8, so はちほん and はちひき are heard alongside はっぽん and はっぴき. When in doubt, the forms in the table above are widely understood.

Learn one model counter for each sound group: 本 for h, 個 for k, 冊 for s. When you meet a new counter, check its first sound and apply the same changes.

Two related counters worth knowing early

回 counts times, while 階 (かい) counts floors of a building. They sound the same, but floors have one extra change: three floors is usually 三階 (さんがい), and the question is 何階 (なんがい), though さんかい and なんかい are also heard. You will see 階 on every elevator and department store directory, so it is worth learning even before it appears in a textbook.

Time, money and age also use counters: 時 for hours, 分 for minutes, 円 for yen and 歳 for years of age. Their irregular readings, such as よじ and いっぷん, are covered in the Japanese numbers guide, and the number converter shows the reading of any number so you can check the base before adding a counter.

What to do when you do not know the counter

Nobody learns every counter, and native speakers disagree about some of them. Two safe fallbacks will carry you a long way:

• Use つ for objects up to ten. ひとつください (one, please) works in almost any shop or restaurant, whatever the item is.
• Use 個 for small objects above ten. In casual speech 個 is often used broadly for countable things, so 十五個 (じゅうごこ) is rarely wrong for small items.

Beyond that, learn counters with the nouns you actually use. When you learn 傘 (かさ, umbrella), learn 一本 with it, and when you learn 切符 (きっぷ, ticket), learn 一枚. Pairing a counter with a real noun makes the shape category stick far better than a list, and it is the same approach that works for kanji in general.

Counters on the JLPT N5

Most of these counter kanji, such as 人, 本 and 円, appear on common N5 kanji lists, and beginner tests often check counters through readings and short listening exchanges like ordering in a shop. The JLPT N5 study guide shows where they fit in a wider study plan. Moji covers the kanji behind these counters with spaced repetition reviews and Lock Screen widgets, which suits a small set you will use every day.