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Number to Japanese Converter

Enter any number and instantly convert it into Japanese Kanji and Hiragana. Great for JLPT learners, teachers, and anyone studying Japanese.

Convert a Number

Only digits 0–9 are accepted. Example: 10000 → 一万（いちまん）
Kanji
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Hiragana
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Tip: You can copy the results and paste them into your notes, flashcards, or worksheets.

Learn Japanese Numbers (Quick Guide)

This section explains Japanese numbers in a simple way. You’ll learn the patterns, the common sound changes, and how big numbers work using 万 (man), 億 (oku), and 兆 (chou).

1) Numbers 0–9 (the basics)

These are the building blocks. Once you know 0–9, everything else is just combining patterns.

Number Kanji Hiragana Romaji
0 零 れい rei
1 一 いち ichi
2 二 に ni
3 三 さん san
4 四 よん／し yon / shi
5 五 ご go
6 六 ろく roku
7 七 なな／しち nana / shichi
8 八 はち hachi
9 九 きゅう kyuu
Tip: 4 can be よん (yon) or し (shi). 7 can be なな (nana) or しち (shichi). In daily life, よん (yon) and なな (nana) are very common.

2) 10–99 pattern (super easy)

Japanese uses: (tens) + 十 (じゅう / juu) + (ones). The only special rule: when the tens digit is 1, you don’t say 一十 — it becomes just 十 (じゅう / juu).

Number Kanji Hiragana Romaji How to think
11 十一 じゅういち juu ichi 10 (十 / juu) + 1 (一 / ichi)
12 十二 じゅうに juu ni 10 (十 / juu) + 2 (二 / ni)
21 二十一 にじゅういち ni juu ichi 2 (二 / ni) + 10 (十 / juu) + 1 (一 / ichi)
22 二十二 にじゅうに ni juu ni 2 + 10 + 2
30 三十 さんじゅう san juu 3 + 10
34 三十四 さんじゅうよん san juu yon 3 + 10 + 4
99 九十九 きゅうじゅうきゅう kyuu juu kyuu 9 + 10 + 9

3) 100–9,999 (hundreds and thousands)

100 is 百 (ひゃく / hyaku) and 1,000 is 千 (せん / sen). Just like 10, when it’s exactly 100 or 1,000, Japanese usually omits “one” (一).

Number Kanji Hiragana Romaji Note
100 百 ひゃく hyaku 1 hundred (一 is omitted)
300 三百 さんびゃく sanbyaku sound change: 3 + hyaku → sanbyaku
600 六百 ろっぴゃく roppyaku sound change: roku + hyaku → roppyaku
800 八百 はっぴゃく happyaku sound change: hachi + hyaku → happyaku
1000 千 せん sen 1 thousand (一 is omitted)
3000 三千 さんぜん sanzen sound change: san + sen → sanzen
8000 八千 はっせん hassen sound change: hachi + sen → hassen
Sound changes you must remember:
  • 三百 = さんびゃく (sanbyaku)
  • 六百 = ろっぴゃく (roppyaku)
  • 八百 = はっぴゃく (happyaku)
  • 三千 = さんぜん (sanzen)
  • 八千 = はっせん (hassen)

4) Big numbers (万・億・兆) — the “4-digit chunk” rule

This is the #1 thing learners struggle with: Japanese groups by 4 digits, not 3 digits. So instead of “thousand / million / billion”, you think in terms of 万 (まん / man), 億 (おく / oku), and 兆 (ちょう / chou).

Number Kanji Hiragana Romaji Meaning
10000 一万 いちまん ichi man 10,000 = 1 man
100000 十万 じゅうまん juu man 100,000 = 10 man
1000000 百万 ひゃくまん hyaku man 1,000,000 = 100 man
100000000 一億 いちおく ichi oku 100,000,000 = 1 oku
1000000000000 一兆 いっちょう icchou 1,000,000,000,000 = 1 chou
Common mistake: Don’t read 1,000,000 as “one million”. In Japanese it is 百万 (ひゃくまん / hyaku man) — literally “100 man”.

Japanese Numbers Explained (Helpful Guide)

If Japanese numbers feel confusing, it’s usually because of 万 (まん / man). Once you learn the “4-digit chunk” idea, big numbers become much easier.

1) The core words you’ll use all the time

Unit Kanji Hiragana Romaji
Ten十じゅうjuu
Hundred百ひゃくhyaku
Thousand千せんsen
Ten-thousand万まんman
Hundred-million億おくoku
Trillion兆ちょうchou

2) How to read numbers like a native (the “chunk” method)

When you see a large number, do this:

  1. Split it into 4-digit groups from the end.
  2. Read each group like a normal 1–9999 number.
  3. Add 万 (まん / man), 億 (おく / oku), 兆 (ちょう / chou) depending on the group.
Example: 12,345,678 → split as 1234万5678
Read as: 千二百三十四万五千六百七十八
Hiragana: せんにひゃくさんじゅうよんまんごせんろっぴゃくななじゅうはち
Romaji: sen ni hyaku san juu yon man go sen roppyaku nana juu hachi

3) Speaking tips (small but useful)

  • In daily speech, よん (yon) is often preferred over し (shi).
  • For 7, both なな (nana) and しち (shichi) are used. Many learners prefer なな (nana) to avoid confusion.
  • Memorize the sound changes: さんびゃく (sanbyaku), ろっぴゃく (roppyaku), はっぴゃく (happyaku), さんぜん (sanzen), はっせん (hassen).
Try it now: Enter a number above and compare the output to the patterns you learned here. After a few tries, Japanese numbers become surprisingly easy.