How to Count in Japanese: Numbers, Counters, and Examples

Key takeaways

• Japanese numbers follow a logical pattern, but counting objects requires special words called counters.
• Different counters apply to different categories of objects: long things, flat things, animals, people, and more.
• The native Japanese counting system (hitotsu, futatsu…) is separate from the Sino-Japanese number system and used for general counting up to 10.
• People and floors each have irregular counters that you need to memorise individually.
• Practising counters in real sentences is the only way to make them automatic.

You are studying Japanese and the numbers feel manageable at first. You learn ichi, ni, san and think the hard part is over. Then someone asks how many books you have, or how many cats you own, and you realise that Japanese does not let you just say the number.

You need a counter, and the counter depends entirely on what you are counting. italki connects learners with 30,000+ expert tutors trusted by over 10 million learners worldwide. A Japanese tutor online can drill counters with you through conversation, not just lists, so you learn them the way native speakers use them.

This guide covers four areas: basic numbers from 1 to 10,000, the ten most essential counters with examples, the native Japanese counting system, and practical phrases for asking and answering “how many?”

Basic numbers in Japanese

Japanese	Romaji	English
一	ichi	1
二	ni	2
三	san	3
四	shi / yon	4
五	go	5
六	roku	6
七	shichi / nana	7
八	hachi	8
九	ku / kyuu	9
十	juu	10
百	hyaku	100
千	sen	1,000
万	man	10,000

Note: 四 (yon: 4) and 七 (nana: 7) are preferred in everyday speech. 万 (man: 10,000) is a critical unit . Japanese groups numbers by ten-thousands, not thousands. Master Japanese numbers systematically. While basic numbers are straightforward, understanding how they combine and the importance of the 万 grouping system requires explanation from someone who speaks the language. Work with the best Japanese tutors to ensure you are building the right foundation.

Japanese counters: the 10 you need first

Counters are words that attach to numbers when you count specific types of objects.

本 (hon: long thin objects)

Used for: pencils, bottles, trees, rivers, roads, films, phone calls.

Japanese	Romaji	English
一本	ippon	1
二本	nihon	2
三本	sanbon	3

枚 (mai: flat objects)

Used for: paper, shirts, plates, stamps, tickets, photographs.

Japanese	Romaji	English
一枚	ichimai	1
二枚	nimai	2
三枚	sanmai	3

個 (ko: small general objects)

Used for: apples, eggs, small boxes, most small items when unsure of the correct counter.

Japanese	Romaji	English
一個	ikko	1
二個	niko	2
三個	sanko	3

匹 (hiki: small animals)

Used for: dogs, cats, fish, insects, rabbits.

Japanese	Romaji	English
一匹	ippiki	1
二匹	nihiki	2
三匹	sanbiki	3

冊 (satsu: bound books and magazines)

Used for: books, magazines, notebooks, manga volumes.

Japanese	Romaji	English
一冊	issatsu	1
二冊	nisatsu	2
三冊	sansatsu	3

台 (dai: machines and vehicles)

Used for: cars, bicycles, computers, televisions, washing machines.

Japanese	Romaji	English
一台	ichidai	1
二台	nidai	2
三台	sandai	3

杯 (hai: cups and glasses of liquid)

Used for: cups of coffee, glasses of water, bowls of soup.

Japanese	Romaji	English
一杯	ippai	1
二杯	nihai	2
三杯	sanbai	3

人 (nin/ri: people)

One person and two people are fully irregular.

Japanese	Romaji	English
一人	hitori	1 person
二人	futari	2 people
三人	sannin	3 people
四人	yonin	4 people
五人	gonin	5 people

階 (kai: floors of a building)

Japanese	Romaji	English
一階	ikkai	1st floor
二階	nikai	2nd floor
三階	sangai	3rd floor
四階	yonkai	4th floor
五階	gokai	5th floor

Drill counters with real-world context. Counter rules have exceptions and sound changes that only make sense when you hear them in context. Work with a conversational Japanese tutor to practice counting everyday objects so the patterns stick automatically.

The native Japanese counting system

Japanese	Romaji	English
一つ	hitotsu	1 (general)
二つ	futatsu	2
三つ	mittsu	3
四つ	yottsu	4
五つ	itsutsu	5
六つ	muttsu	6
七つ	nanatsu	7
八つ	yattsu	8
九つ	kokonotsu	9
十	too	10

These words do not attach to a counter. You use them alone: 三つください (mittsu kudasai: three, please). Understand when to use native vs Sino-Japanese numbers. Native Japanese numbers are used for general quantities and up to 10; Sino-Japanese numbers (ichi, ni, san) are used with counters and for larger numbers. This distinction confuses many learners. A Japanese teacher can explain when to use each system and practice both until you choose automatically.

Practical counting: asking and answering

いくつ (ikutsu: how many?) is used for general quantities. When you know the counter, use 何 (nan) + counter:

• 何本ですか。(Nanbon desu ka: How many long thin objects?)
• 何枚ですか。(Nanmai desu ka: How many flat objects?)
• 何人いますか。(Nannin imasu ka: How many people are there?)
• 何冊ありますか。(Nansatsu arimasu ka: How many books are there?)

Age uses 歳 (sai: years old): 私は二十五歳です (Watashi wa nijuugosai desu: I am 25 years old). When buying something: コーヒーを一杯ください (Koohii o ippai kudasai: One coffee, please). Practice counting in natural sentences. The only way counters become automatic is through repeated use in real contexts. An italki Japanese language tutor will have you count objects, answer questions, and navigate shopping scenarios in Japanese until the correct counter pops out without thinking. Stop fumbling for the right counter. Master Japanese numbers and counters through guided conversation practice. italki’s community of 30,000+ expert tutors includes Japanese specialists with experience of drilling counters until they become second nature. Book a trial Japanese lesson online and start counting with confidence.

FAQ

How long does it take to learn Japanese counters? Most learners get comfortable with the 10 most common counters within a few weeks of regular practice. There are over 100 counters in total, though most are rare — focus on the ones in this guide first. Is it ever acceptable to use the wrong counter in Japanese? In casual speech, native speakers are generally understanding if you use a general counter like 個 (ko). However, using the wrong counter in formal settings sounds unnatural. What is the best way to practise counters outside of class? Count things around you in Japanese as you go about your day. Count the books on your shelf using 冊 (satsu), the cars on the street using 台 (dai), and the cups on your table using 杯 (hai).