Japanese Numbers: How to Count 1–1,000,000 (2026 Update)

TL;DR

Japanese has two parallel counting systems: kango (Sino-Japanese) and wago (native Japanese). Numbers 1 through 10 use both systems, while everything above 10 uses kango exclusively. Sound changes at 300, 600, 800, 3,000, and 8,000 trip up almost every beginner. Japanese also groups large numbers by ten-thousands instead of thousands, and requires counter words to count objects, people, and animals.

Japanese numbers follow a strikingly logical pattern once you understand a few core rules. The decimal system is cleaner than English (no oddities like “eleven” or “twelve”), and you can construct any number up to the trillions by combining a handful of building blocks. But the system also has genuine pitfalls: certain numbers have two valid pronunciations, sound changes warp familiar syllables at specific thresholds, and you can’t count objects without a special classifier word.

This glossary covers every piece of the puzzle in one place, from zero to a trillion, including the pronunciation traps, counter words, and cultural superstitions that most number guides split across multiple pages.

If you’re studying Japanese vocabulary through gameplay, a game-based Japanese app can help you drill these numbers alongside real word categories.

Two Counting Systems: Kango vs. Wago

Before memorizing any numbers, you need to know that Japanese has two completely separate sets of number words.

Kango (漢語) refers to the Sino-Japanese readings, borrowed from Chinese centuries ago. These are the numbers you’ll use most: ichi, ni, san, shi/yon, go, roku, shichi/nana, hachi, ku/kyū, jū. Kango is used for all cardinal numbers, for combining with counter words, and for every number above 10.

Wago (和語) refers to native Japanese words: hitotsu, futatsu, mittsu, and so on up to tō (ten). The wago system only covers 1 through 10, and it doesn’t require a counter word. That makes it useful as a general-purpose way to count things, especially when you don’t know which counter to use.

Think of it this way: kango is the workhorse system for math, dates, money, and formal counting. Wago is the fallback system for counting up to ten objects in casual speech.

Japanese Numbers 1 to 10: Full Reference Table

This is the table to bookmark. Every number from 1 to 10 is listed with its kanji, kango reading, and wago reading.

Notice that 4, 7, and 9 each have two kango readings. That’s not a typo. It’s one of the most common sources of confusion for beginners, and it deserves its own section.

If you’re learning to write these kanji by hand, tracing exercises for kanji can help lock in stroke order early.

Why 4, 7, and 9 Have Two Pronunciations

Three numbers in Japanese carry double readings, and the reason is partly linguistic, partly superstitious.

4: Shi vs. Yon

Shi (し) is the original on’yomi reading, but it’s also a homophone for 死 (death). Japanese culture takes this seriously. Some buildings skip the 4th floor entirely, and gifts are never given in sets of four. Because of the death association, yon became the preferred pronunciation in most standalone contexts.

Rule of thumb: Use yon by default. Shi appears in fixed compounds like shi-gatsu (April, the 4th month).

7: Shichi vs. Nana

Shichi (しち) can sound uncomfortably similar to shi (four/death) in fast speech, and some interpretations connect it to “place of death.” To avoid confusion, nana is the standard pronunciation when counting or when the number stands alone.

Rule of thumb: Use nana by default. Shichi is used in shichi-gatsu (July) and at 7 o’clock (shichi-ji).

9: Ku vs. Kyū

Ku (く) is a homophone for 苦 (suffering). Hospitals often avoid room numbers containing 9 for this reason. Kyū is the safer, more neutral choice in everyday counting.

Rule of thumb: Use kyū by default. Ku appears in ku-gatsu (September) and some counter combinations.

Here’s an interesting detail that practitioners on language forums point out: when counting backwards, Japanese speakers often revert to the “avoided” readings. So you’ll hear “go, shi, san, ni, ichi” in a countdown rather than “go, yon, san, ni, ichi,” apparently because the rhythm flows better. Forward counting uses yon; backward counting frequently uses shi.

Japanese Numbers 11 to 99

This is where the system’s elegance becomes clear. Japanese builds teen and two-digit numbers with a simple formula:

[digit] + jū (10) + [digit]

So 11 is jū-ichi (ten-one), 25 is ni-jū-go (two-tens-five), and 99 is kyū-jū-kyū (nine-tens-nine). No irregularities, no “eleven” or “twelve” exceptions.

Once you know 1 through 10, you can construct every number up to 99 without memorizing anything new.

Hundreds (100–900): Sound Changes That Trip Everyone Up

The word for 100 is hyaku (百). Forming hundreds follows the same multiplication logic: 200 is ni-hyaku, 400 is yon-hyaku. But three numbers break the pattern with sound changes called rendaku (euphonic changes). These happen because certain consonant combinations are awkward to pronounce quickly, so the language smoothed them out over time.

The numbers 3, 6, and 8 are the culprits. They trigger similar sound modifications across hundreds, thousands, and even counter words, a pattern most guides fail to highlight. Once you internalize that 3, 6, and 8 are “the irregular numbers,” you’ll spot the pattern everywhere.

The Ichi-Drop Rule

Notice that 100 is hyaku, not ichi-hyaku. When no digit higher than one precedes hyaku, you drop the ichi. This rule continues at 1,000 (sen, not ichi-sen). But it stops at 10,000, where you must say ichi-man. The boundary unit is man, and every unit above it keeps its leading digit.

Thousands (1,000–9,000): More Sound Changes

The word for 1,000 is sen (千). The ichi-drop rule applies here too: just say sen for 1,000, not ichi-sen. The same three troublemakers (3, 6, 8) cause sound shifts again.

The same consonant-softening logic applies. Sanzen and hassen exist because “san-sen” and “hachi-sen” are clunky to say at natural speed. If you’re learning stroke order alongside spelling, drilling these written forms reinforces the irregular pronunciations.

Ten-Thousands and Beyond: The Myriad System

This section matters more than most guides suggest. The myriad system is the single largest conceptual gap between English and Japanese numbers.

English groups numbers by thousands: thousand, million, billion, trillion, each separated by three zeros. Japanese groups by ten-thousands, using a completely different set of unit words:

So one million in Japanese is not a single word. It’s hyaku-man (百万), literally “hundred ten-thousands.” One billion is jū-oku (十億), “ten hundred-millions.”

The “Re-Comma” Mental Trick

When reading a large Japanese number, place a mental comma every four digits instead of every three.

English: 1,000,000 (one million) Japanese grouping: 100,0000 → hyaku-man

English: 50,000,000 (fifty million) Japanese grouping: 5000,0000 → go-sen-man

This four-digit grouping is inherited from the Chinese numeral system and is the reason 万 (man) is so foundational. In practical terms, man comes up constantly with money. A hotel room might cost 2万 yen (ni-man en, about 20,000 yen). Electronics are priced in man. Salaries are discussed in man. Ignoring this unit means struggling with every real-world price in Japan.

Remember: ichi-man keeps the “ichi.” The ichi-drop rule that applies to hyaku and sen does not apply to man.

Zero in Japanese

Zero has three words, each for different situations:

• ゼロ (zero): Borrowed from English. The most common form in everyday speech, sports scores, and measurements.

• れい (rei): The native Sino-Japanese reading. Used in formal contexts, counting, and ceremonies.

• まる (maru): Literally “circle.” Used only when reading individual digits aloud, such as phone numbers or codes. You’d say “maru-san-yon” for the sequence 034.

Ordinal Numbers in Japanese

Turning a cardinal number into an ordinal is straightforward. Add 番目 (banme) after the number.

• 1st: ichi-banme (一番目)

• 2nd: ni-banme (二番目)

• 3rd: san-banme (三番目)

番 (ban) alone marks a number or ranking (“Japan’s number one”). Adding 目 (me) creates a true ordinal. To use it as a modifier before a noun, append の: ichi-banme no (一番目の), meaning “the first…”

Essential Counter Words: The Top 10 You Actually Need

Japanese has somewhere between 300 and 500 counter words, depending on who’s counting. That sounds overwhelming, but native speakers don’t use most of them either. About 15 common counters cover roughly 80% of daily situations.

Here are the ten most practical counters, presented as a mini-glossary:

The Universal Fallback: つ (Tsu)

The tsu counter is colloquially called the “universal counter” because almost all its forms end in つ. You can use it with most inanimate objects in casual speech without causing misunderstandings. But for people (人), animals (匹/頭), and flat objects (枚), using tsu sounds noticeably unnatural. Prioritize learning 人, 匹, and 枚 early so you can replace tsu in the most common situations.

Watch for Sound Changes in Counters Too

The same numbers that cause trouble with hyaku and sen (3, 6, 8) cause similar shifts with counters. For example, with 本 (hon): san-bon, rop-pon, hap-pon. It’s the same pattern. Once you recognize that 3, 6, and 8 are always the numbers that trigger changes, the “irregularities” across the entire language start to feel predictable.

The Rabbit Counter Curiosity

Here’s a strange piece of Japanese linguistic trivia: rabbits are counted with 羽 (wa), the counter for birds. The most popular explanation is that Buddhist monks, who were forbidden from eating four-legged animals, classified rabbits as “birds” based on their long ears resembling wings. This workaround let them eat rabbit meat under the letter of the rule. Whether historically accurate or not, the counter has stuck for centuries.

If you want to practice counters and Japanese food vocabulary together, ordering scenarios are one of the best real-world contexts for drilling these classifiers.

Lucky and Unlucky Numbers in Japanese Culture

Numbers carry real weight in Japanese daily life. This isn’t abstract folklore; it affects architecture, gift-giving, and marketing.

Unlucky: 4 and 9

The number 4 (shi) is a homophone for 死 (death). The number 9 (ku) sounds like 苦 (suffering). Because of this, many hospitals and hotels skip room numbers containing 4 or 9. Some buildings jump from the 3rd floor to the 5th, eliminating the 4th floor entirely.

Combined numbers are even worse. 42 sounds like shini (死に, “to die”). 49 sounds like shiku (死苦, “a painful death”). In Japanese motorsport and racing, these numbers are avoided. When giving gifts like plates, sets of three or five are standard, never four.

Lucky: 7 and 8

Seven is considered auspicious, largely due to Buddhism. There are celebrations on the seventh day after a baby is born, mourning on the seventh day after a death, and the Seven Gods of Luck (七福神) are a fixture of Japanese folk religion. The July 7th celebration Tanabata (七夕, “seventh evening”) is one of Japan’s most beloved festivals.

Eight is lucky because the kanji 八 widens at the bottom, suggesting gradual expansion and prosperity. This visual symbolism is called 末広がり (suehirogari). The number 8 is popular for business names, license plates, and phone numbers.

Goroawase: Number Wordplay

Goroawase (語呂合わせ) is a form of Japanese wordplay where numbers are read as syllables to spell out words. Businesses use this to make phone numbers memorable. The most famous example is the 109 department store in Shibuya, Tokyo. The name comes from reading 10-9 as “tō-kyū,” a pun on the Tokyu department store chain that owns the building.

This kind of number-as-language play is deeply embedded in Japanese culture, showing up in license plates, product names, and advertising campaigns.

Daiji: Formal Anti-Fraud Kanji

There’s one more set of Japanese number kanji most guides never mention. Daiji (大字) are formal variants of number characters used in legal and financial documents. The standard kanji for 1 (一), 2 (二), 3 (三), and 10 (十) can be altered with a single brushstroke, turning a one into a two or a three. To prevent fraud, formal documents use more complex characters:

• 一 → 壱 (ichi)

• 二 → 弐 (ni)

• 三 → 参 (san)

• 十 → 拾 (jū)

You’ll see these on banknotes, legal contracts, and traditional certificates. You don’t need to write them as a learner, but recognizing them explains why official Japanese documents sometimes use unfamiliar kanji for simple numbers.

Practical Contexts: Money, Time, and Dates

Japanese numbers become real when you connect them to situations you’ll actually encounter.

Money

The yen (円, en) doesn’t use small denominations, so you constantly deal with large numbers. A cup of coffee might cost 500 yen (go-hyaku en). A meal is often 1,000 to 3,000 yen (sen en to san-zen en). Hotels run in the range of several man yen, making 万 one of the first large-number units you’ll use in practice.

Time

Hours use the counter 時 (ji). Most are regular (ichi-ji for 1 o’clock, ni-ji for 2 o’clock), but 4 o’clock is yo-ji (not yon-ji or shi-ji) and 7 o’clock is shichi-ji (not nana-ji). These exceptions just need to be memorized.

Dates and Months

Months are straightforward: the month number plus 月 (gatsu). January is ichi-gatsu, February is ni-gatsu. Here’s where the “avoided” readings show up in fixed form: April is shi-gatsu, July is shichi-gatsu, and September is ku-gatsu. These are among the few places where shi, shichi, and ku are standard and expected.

Tips for Memorizing Japanese Numbers

Count aloud daily. Even five minutes of counting from 1 to 100 while commuting builds automatic recall. Vary it: count by tens, then by hundreds, then try random three-digit numbers.

Anchor numbers to real contexts. Practice saying prices at a Japanese restaurant menu, reading the time in Japanese, or converting your phone number into Japanese digits.

Drill the sound changes separately. Make a focused list of just the irregular forms (sanbyaku, roppyaku, happyaku, sanzen, hassen) and review them until they’re automatic. A spaced repetition system is particularly effective here because these exceptions need to move from conscious recall to reflex.

Learn counters in batches. Start with つ (the universal fallback), then add 人, 匹, and 枚. Build from there as you encounter new categories in daily study. Short daily practice sessions work better than long infrequent cram sessions for this kind of vocabulary.

If you want to practice Japanese numbers, counters, and vocabulary through actual gameplay rather than flashcard repetition, Lingo Legend’s Japanese features combine RPG card-battling with spaced repetition across 3,500+ words and phrases.

FAQ

How do you count from 1 to 10 in Japanese?

Using the kango (Sino-Japanese) system: ichi, ni, san, yon (or shi), go, roku, nana (or shichi), hachi, kyū (or ku), jū. Using the wago (native Japanese) system: hitotsu, futatsu, mittsu, yottsu, itsutsu, muttsu, nanatsu, yattsu, kokonotsu, tō.

Why does 4 have two pronunciations in Japanese?

The reading shi (し) is a homophone for the word “death” (死). To avoid the unlucky association, yon became the preferred pronunciation in most contexts. Shi still appears in fixed compounds like shi-gatsu (April).

What are the most important Japanese counter words to learn first?

Start with つ (tsu) as a general fallback for objects, then learn 人 (nin, for people), 匹 (hiki, for small animals), 枚 (mai, for flat things), and 本 (hon, for long thin objects). These five counters handle a large portion of everyday counting.

Why is Japanese different from English for large numbers?

Japanese groups numbers by ten-thousands (万, man) rather than thousands. So one million is hyaku-man (hundred ten-thousands), not a single unit. The trick for English speakers is to mentally place commas every four digits instead of every three when reading Japanese numbers.

Is it ichi-hyaku or just hyaku for 100?

Just hyaku. Japanese drops the “ichi” before hyaku (hundred) and sen (thousand). But at 10,000, you keep it: ichi-man. This “ichi-drop rule” is one of the most commonly missed patterns in Japanese number learning.

What is the unluckiest number in Japanese?

Four (shi/死) is the most universally avoided number, similar to how Western cultures treat 13. The combination 49 (shiku, sounding like “painful death”) is considered even worse. Buildings, hospitals, and racing teams frequently skip these numbers.

What is goroawase?

Goroawase (語呂合わせ) is Japanese number wordplay where digits are read as syllables to form words. The famous Shibuya 109 store gets its name from reading 10-9 as “tō-kyū.” Businesses use this to make phone numbers and brand names memorable.

Do I need to learn all 500 Japanese counter words?

No. Native speakers don’t use most of them. About 15 common counters cover roughly 80% of daily situations. Use the tsu counter as a casual fallback for objects when you don’t know the specific counter, and gradually build your repertoire from there.

Also studying other languages? Check out our guides to French numbers and Spanish numbers, or explore more Japanese phrases and vocabulary.