Counting in Japanese has a scary reputation, and it is almost entirely undeserved. The number system itself is one of the most logical anywhere: learn ten words, and you can say thousands of numbers without memorizing a single one more. The reputation comes from counters, which we will get to, but let us start with the good news.
Japanese has no oddball words like "eleven," "twelve," or "eighty." Every number is built by adding and multiplying a small set of ten pieces. We will look at those pieces first, then at the simple machine that snaps them together into any number you need.
基The ten building blocks: 1 to 10
Everything starts here. These ten words are the entire foundation, so spend your first few days getting them automatic.
- 一 · ichi · 1
- 二 · ni · 2
- 三 · san · 3
- 四 · yon (or shi) · 4
- 五 · go · 5
- 六 · roku · 6
- 七 · nana (or shichi) · 7
- 八 · hachi · 8
- 九 · kyū (or ku) · 9
- 十 · jū · 10
Say them out loud a few times, top to bottom and then in random order. Once these ten sit comfortably in your head, most of the work is already done.
組How the numbers stack up
Here is the trick that makes the rest free. For the tens, you say the digit followed by 十 (10). For anything past ten, you add the single digit after it. That is the whole rule.
- 11 = 十一 (jū-ichi) · ten and one
- 20 = 二十 (ni-jū) · two tens
- 34 = 三十四 (san-jū-yon) · three tens and four
- 99 = 九十九 (kyū-jū-kyū) · nine tens and nine
No exceptions, no strange "eighty" that secretly means "four twenties." Above a hundred, the same pattern just keeps going with three more words:
- 百 · hyaku · 100
- 千 · sen · 1,000
- 万 · man · 10,000
Let us pull a number apart. 247 is 二百四十七 (ni-hyaku-yon-jū-nana): two hundreds, four tens, and seven. And 3,581 comes out as 三千五百八十一 (san-zen-go-hyaku-hachi-jū-ichi): three thousands, five hundreds, eight tens, and one. You break the number into place values, then read them off in order. That is all there is to it.
One thing to notice above: a few readings soften for sound. 三百 stays san-byaku in some counts, 千 becomes zen after 三 (san-zen), and 六百 turns into roppyaku. These small shifts follow your ear more than any rule, and they settle in fast once you say numbers regularly. Do not drill them in isolation; you will pick them up in context.
変The readings that shift: 4, 7, and 9
The one real snag is that three digits have two readings each, and Japanese picks between them depending on the word. Most of the time you lean on yon, nana, and kyū, which are clearer to the ear and safer for a beginner.
- 4 · yon or shi (shi sounds like the word for death, so it is often avoided)
- 7 · nana or shichi (nana is less easily confused with ichi)
- 9 · kyū or ku (ku sounds like the word for suffering, so it is used sparingly)
You will still meet the other readings in fixed expressions, like shichi in 七月 (July) and ku in 九月 (September). Those are set phrases you learn as whole words. Early on, just default to yon, nana, and kyū, and you will be right in the large majority of situations.
個Counters, without the panic
To count objects in Japanese, you do not just say "three." You attach a small word, the counter, and which counter you use depends on the kind of thing you are counting. This is the part that scares people. It should not, because there is a shortcut built into the language.
That shortcut is つ (tsu), a general counter that works for everyday objects up to nine. Its readings are a little irregular (一つ hitotsu, 二つ futatsu, 三つ mittsu, and so on), but with つ alone you can count almost anything at the start while you slowly pick up the precise counters.
- 人 · -nin · for people (例: 三人 san-nin, three people; note that 一人 hitori and 二人 futari are special)
- 匹 · -hiki · for small animals
- 冊 · -satsu · for books and notebooks
- 枚 · -mai · for flat objects (sheets of paper, tickets, plates)
りんごを三つください。
ringo o mittsu kudasai.
Three apples, please.
Do not try to memorize every counter in one sitting. There are dozens of them, and most are rare. Start with the plain numbers, add the つ shortcut, then learn 人 for people. Everything else comes as you actually need it, never as one long list to cram.
時Telling time and counting minutes
Time uses the numbers you already know, with two small words bolted on. For the hour you take the digit plus 時 (ji). For minutes, the digit plus 分 (fun or pun, depending on the number).
- 一時 · ichi-ji · one o'clock
- 七時 · shichi-ji · seven o'clock
- 三時半 · san-ji han · half past three (半 = half)
- 十分 · juppun · ten minutes
今、九時です。
ima, ku-ji desu.
It is nine o'clock now.
The clock keeps a couple of fixed readings: four o'clock is 四時 (yo-ji) and nine o'clock is 九時 (ku-ji). You do not have to force these in advance. They come back so often when you read the time every day that they stick on their own. If you also want dates, note how the same numbers drive the calendar in our guide to the days of the week in Japanese.
円Prices, money, and bigger numbers
Money is where counting pays off fast, because prices in Japan are written and spoken in exactly the system above, with 円 (en, yen) tacked on the end. A price like 1,980 yen is 千九百八十円 (sen-kyū-hyaku-hachi-jū-en): one thousand, nine hundred, eight tens, and yen. Nothing new, just the same stacking you already learned.
The one habit worth building early is thinking in units of 万 (man), ten thousand, because Japanese groups large numbers by four digits rather than three. So 30,000 is 三万 (san-man), and 250,000 is 二十五万 (ni-jū-go-man). It feels strange for a day, then clicks. Practice with real prices, since those are the numbers you will actually hear at a register or read on a menu.
これは千五百円です。
kore wa sen-go-hyaku-en desu.
This is 1,500 yen.
序What order to learn all this in
A sensible path: first 1 to 10 until they come out without thinking, then the stacking rule up to 10,000, then the つ shortcut and the 人 counter, and only after that the specific counters as real situations call for them. Trying to swallow everything at once is the surest way to wear yourself out for nothing.
Numbers happen to be ideal material for review, since you meet them constantly and only need a handful of words to cover thousands of cases. That combination, few items and heavy reuse, is exactly what makes a short daily habit so effective. The core number words also sit right at the center of any JLPT N5 vocabulary list, so time spent here pays off twice.
習Why counting in Japanese rewards consistency
The number system rewards short, regular practice better than almost any other topic in the language: ten pieces, one rule for assembling them, and you have covered thousands of numbers. You do not need long study sessions. You need a few minutes often, so the words stay warm and the small sound shifts settle in naturally. If greetings are next on your list, the same little-and-often approach works for learning to say hello in Japanese.
At Hibi, numbers and the first counters show up inside real sentences: prices, times, quantities, with the kanji on screen and romaji available when you want it. You review them just enough to keep them, without cramming. Hibi is launching soon on the App Store, and you can see what it is about on the Hibi page. Five minutes a day, and counting stops being a chore and starts being something you barely think about.