What are Counters?
Counters (助数詞 josūshi) are special words attached to numbers when counting objects, people, or actions in Japanese. Different counters are used based on the shape, size, or type of object being counted.
Without counter: 3 ❌ (incomplete)
With counter: 3つ ✓ "3 items"
3人 ✓ "3 people"
3本 ✓ "3 long objects"
Basic Structure
Pattern: Number + Counter
Number + Counter
│ │
2 + 人 = ふたり
"Two people"
3 + 本 = さんぼん
"Three long objects"
5 + 枚 = ごまい
"Five flat objects"
Why Counters Exist
Counters serve several purposes:
- Classify objects by type or shape
- Provide clarity about what's being counted
- Add specificity to quantities
- Follow linguistic patterns similar to Chinese
English: "Three pieces of paper"
(uses "pieces of" as measure word)
Japanese: 紙3枚 (かみさんまい)
(uses 枚 counter for flat objects)
Essential Counter Categories
By Shape
つ - General items
本 (ほん/ぼん/ぽん) - Long, cylindrical objects
枚 (まい) - Flat, thin objects
個 (こ) - Small, compact objects
台 (だい) - Machines, vehicles
By Living Things
人 (にん/り) - People
匹 (ひき/びき/ぴき) - Small animals
頭 (とう) - Large animals
羽 (わ) - Birds, rabbits
By Container/Portion
杯 (はい/ばい/ぱい) - Cups, glasses, bowls
皿 (さら) - Plates/dishes of food
本 (ほん) - Bottles (also long objects)
By Abstract
回 (かい) - Times, occasions
度 (ど) - Degrees, times
階 (かい) - Floors of buildings
Sound Changes (Phonetic Variations)
Many counters undergo sound changes when combined with certain numbers:
ほん/ぼん/ぽん Pattern
1本 (いっぽん) - 1 long object
2本 (にほん) - 2 long objects
3本 (さんぼん) - 3 long objects
4本 (よんほん) - 4 long objects
6本 (ろっぽん) - 6 long objects
8本 (はっぽん) - 8 long objects
10本 (じゅっぽん/じっぽん) - 10 long objects
ひき/びき/ぴき Pattern
1匹 (いっぴき) - 1 small animal
2匹 (にひき) - 2 small animals
3匹 (さんびき) - 3 small animals
4匹 (よんひき) - 4 small animals
6匹 (ろっぴき) - 6 small animals
8匹 (はっぴき) - 8 small animals
10匹 (じゅっぴき/じっぴき) - 10 small animals
はい/ばい/ぱい Pattern
1杯 (いっぱい) - 1 cup/glass
2杯 (にはい) - 2 cups/glasses
3杯 (さんばい) - 3 cups/glasses
6杯 (ろっぱい) - 6 cups/glasses
8杯 (はっぱい) - 8 cups/glasses
10杯 (じゅっぱい/じっぱい) - 10 cups/glasses
General Sound Change Rules
Numbers that trigger changes:
- 1 (いち) → often becomes いっ + [counter changes to っ version]
- 3 (さん) → often triggers ん sound leading to b/p sound
- 6 (ろく) → often becomes ろっ
- 8 (はち) → often becomes はっ
- 10 (じゅう) → often becomes じゅっ or じっ
Common Counters Quick Reference
| Counter | Reading | Used For | Example |
|---|---|---|---|
| つ | tsu | General items | 3 つ (mittsu) |
| 個 | こ | Small objects | 3 個 (sanko) |
| 人 | にん/り | People | 3 人 (san-nin) |
| 本 | ほん/ぼん/ぽん | Long objects | 3 本 (san-bon) |
| 枚 | まい | Flat objects | 3 枚 (san-mai) |
| 匹 | ひき/びき/ぴき | Small animals | 3 匹 (san-biki) |
| 頭 | とう | Large animals | 3 頭 (san-tou) |
| 台 | だい | Machines | 3 台 (san-dai) |
| 冊 | さつ | Books | 3 冊 (san-satsu) |
| 杯 | はい/ばい/ぱい | Cups/bowls | 3 杯 (san-bai) |
| 回 | かい | Times | 3 回 (san-kai) |
| 階 | かい | Floors | 3 階 (san-gai) |
How to Choose the Right Counter
Step 1: Identify the Object Type
Ask yourself:
- What shape is it?
- Is it living or non-living?
- How is it typically measured?
Step 2: Match to Counter Category
Pencil → long, cylindrical → 本
Paper → flat, thin → 枚
Apple → small, round → 個 or つ
Dog → small animal → 匹
Car → machine/vehicle → 台
Step 3: When in Doubt
Use the general counter つ for objects (works for most things):
りんごを3つください
"Three apples, please"
More specific: りんごを3個ください
Asking "How Many?"
With Counters
Use 何 (なん/なに) + counter:
何人ですか？ (なんにん)
"How many people?"
何本ありますか？ (なんぼん)
"How many (long objects) are there?"
何枚ほしいですか？ (なんまい)
"How many (flat objects) do you want?"
General Questions
いくつですか？
"How many?" (general, using native numbers)
いくつありますか？
"How many are there?"
Position in Sentences
Before Particle
りんごを3個買いました
"I bought 3 apples"
友達が2人来ました
"Two friends came"
After Noun
学生が5人います
"There are 5 students"
ペンが3本あります
"There are 3 pens"
End of Sentence
A: 何人いますか？
"How many people are there?"
B: 10人です
"10 people"
Common Patterns
Noun + Counter + Verb
本を2冊読みました
"I read 2 books"
水を3杯飲みました
"I drank 3 glasses of water"
友達に5人会いました
"I met 5 friends"
Noun + が + Counter + Verb
学生が3人来ました
"3 students came"
猫が2匹います
"There are 2 cats"
Counter + の + Noun
3本のペン
"3 pens" (literally: 3 [long objects] of pen)
2枚の紙
"2 sheets of paper"
5人の学生
"5 students"
Special Exceptions
人 (People Counter)
1人 = ひとり (not いちにん) ⚠️
2人 = ふたり (not ににん) ⚠️
3人 = さんにん ✓
4人 = よにん ✓
Days of the Month
Special readings for 1-10:
1日 = ついたち
2日 = ふつか
3日 = みっか
4日 = よっか
...
11日 = じゅういちにち
20 Years Old
20歳 = はたち (special word)
Not: にじゅっさい (though also used)
Formal vs Casual
Casual Conversation
Often omit counters with context:
りんご3つちょうだい
"Give me 3 apples"
友達2人と行った
"I went with 2 friends"
Formal/Written
Use specific counters:
りんごを3個購入いたしました
"I purchased 3 apples"
参加者は50名でございます
"There are 50 participants"
Common Conversations
Example 1: Shopping
A: これをいくつください
"How many of these would you like?"
B: 5個ください
"5, please"
A: 全部で500円です
"That's 500 yen total"
Example 2: Restaurant
A: 何名様ですか？
"How many people?"
B: 4人です
"4 people"
A: ビールを何杯お持ちしましょうか？
"How many beers shall I bring?"
B: 2杯お願いします
"2, please"
Example 3: Pets
A: ペットを飼っていますか？
"Do you have any pets?"
B: はい、犬を2匹飼っています
"Yes, I have 2 dogs"
A: 猫は？
"Cats?"
B: 猫は1匹です
"1 cat"
Counter with "About"
くらい/ぐらい - "About"
3個くらい
"About 3 (small objects)"
10人ぐらい
"About 10 people"
5本ぐらい
"About 5 (long objects)"
ほど - "Approximately"
More formal:
3個ほど
"Approximately 3"
10人ほど
"Approximately 10 people"
Counting Actions
回 (かい) - Times
1回 (いっかい) - once
2回 (にかい) - twice
3回 (さんかい) - 3 times
日本に3回行きました
"I went to Japan 3 times"
度 (ど) - Degrees/Times
1度 (いちど) - once
2度 (にど) - twice
何度も (なんども) - many times
何度も言いました
"I said it many times"
Common Mistakes
Mistake 1: Forgetting counters
Wrong: 3買いました ❌
Right: 3つ買いました ✓
"I bought 3"
Mistake 2: Wrong counter choice
Unnatural: 紙を3本ください ❌
Right: 紙を3枚ください ✓
"3 sheets of paper, please"
(本 is for long objects, not flat)
Mistake 3: Wrong sound changes
Wrong: さんほん (should change) ❌
Right: さんぼん ✓
"3 long objects"
Wrong: いちひき ❌
Right: いっぴき ✓
"1 small animal"
Mistake 4: Using wrong reading for 人
Wrong: いちにん (1 person) ❌
Right: ひとり ✓
Wrong: ににん (2 people) ❌
Right: ふたり ✓
Learning Strategy
Start with These Essential Counters
- つ - General (works for most things)
- 人 - People (most common in conversation)
- 個 - Small objects
- 本 - Long objects
- 枚 - Flat objects
Gradually Add More
- 匹 - Small animals
- 台 - Machines
- 冊 - Books
- 杯 - Cups/glasses
- 回 - Times
Don't Worry About Perfection
- Native speakers often use つ or 個 as defaults
- Context usually makes meaning clear
- Specific counters sound more natural but aren't always required
Counters in Different Contexts
Shopping
これを3個ください
"3 of these, please"
りんごを5個と梨を2個
"5 apples and 2 pears"
Restaurants
ビールを2杯
"2 beers"
餃子を1皿
"1 plate of gyoza"
Office/School
コピーを10枚
"10 copies"
会議が3回
"3 meetings"
Home
猫が2匹
"2 cats"
車が1台
"1 car"
Practice Sentences
Basic Counting
ペンが3本あります
"There are 3 pens"
学生が10人います
"There are 10 students"
紙を5枚ください
"5 sheets of paper, please"
Questions
何個買いますか？
"How many will you buy?"
何人来ますか？
"How many people are coming?"
何回行きましたか？
"How many times did you go?"
Answers
5個買います
"I'll buy 5"
3人来ます
"3 people are coming"
2回行きました
"I went twice"
Related Grammar Points
- Number System Overview - Japanese numbers
- Native vs Sino Numbers - Two number systems
- General Counter (つ) - Most versatile counter
- Specific Counters - Detailed guides for each
- いくつ (ikutsu) - How many
- Quantity expressions - Expressing amounts
- Approximation - About/approximately