Kanji Numeral Converter

How to use

1. Enter either a number in Arabic digits (such as 12345) or a kanji numeral (such as 一万二千三百四十五)
2. Arabic digits are converted to kanji, and kanji numerals or daiji are converted to Arabic digits. There is no button for the direction; it follows from what you enter
3. Under the result, "Other notations" lists the same number digit by digit in kanji, in the 1万2345 style, in daiji, in the older daiji characters, and as an amount on a receipt. The receipt row appears only for numbers from 1 up
4. Press "Copy" on a row to copy only that notation to the clipboard

When the page opens, 12345 is filled in as an example. Clear the field and enter the number you want to convert. Beside the field (below it on narrow screens), a key always lists the digits with their kanji, daiji, and older characters.

Convert a list

To convert many numbers at once, use "Convert a list" below.

1. In "Numbers or kanji numerals, one per line", enter one number per line, or paste a column straight from a spreadsheet
2. Under "Convert to", choose one notation: kanji numerals, digit by digit, 1万2345, daiji, older daiji, 金…円也, or Arabic digits. Kanji numerals is chosen at first. To turn kanji numerals or daiji back into numbers, choose "Arabic digits"
3. The result for each line appears in a table. A line that cannot be read shows the same reason the single field above would give
4. "Copy results" copies the results one per line in the order of the pasted lines. Blank lines and lines that could not be converted stay blank, so the results line up when pasted next to the original column in a spreadsheet. "Copy table (TSV)" copies the input and result as two tab-separated columns

Each line is read by the same rules as the single field above. Lines with only spaces are skipped, and line numbers count blank lines too. Up to 1000 lines are converted. 0 is not written as an amount, so with 金…円也 chosen, a line with 0 is counted as not converted.

Example

This is what appears for 12345.

Arabic digits to kanji
一万二千三百四十五

Other notations
Arabic digits                   12,345
Kanji digit by digit            一二三四五
Digits with 万 and 億           1万2345
Daiji                           壱万弐千参百四拾五
Daiji, older characters         壱萬弐阡参佰肆拾伍
Amount on a receipt             金壱万弐千参百四拾五円也

The other way round, 金壱拾萬円也 gives 100,000, written 十万 in kanji.

More examples:

• 2026 → 二千二十六 (digit by digit, 二〇二六)
• 10 → 十, and 壱拾 in daiji
• 10000 → 一万
• 10000000 → 一千万
• 100000005 → 一億五 (1億5)
• 1億2千万 → 120,000,000

How the notations are written

Kanji numerals with places

The number is split into groups of four digits by 万 (10^4), 億 (10^8), 兆 (10^12), and 京 (10^16), and each group is written with 千 (1000), 百 (100), and 十 (10). Places that are 0 are not written.

• No 一 (one) is written before 十, 百, or 千. 10 is 十, 110 is 百十, and 1000 is 千
• A 一 is written before 万, 億, 兆, and 京. 10000 is 一万, and 100000000 is 一億
• When the four digits before 万, 億, 兆, or 京 start in the thousands place and that digit is 1, it is written 一千. 10000000 is 一千万, and 11000000 is 一千百万. Everyday writing also uses 千万, and both are read

Kanji digit by digit

Each Arabic digit is replaced by its kanji, and 0 is written 〇. This is common for years and numbers in vertical Japanese text, where 2026年 becomes 二〇二六年.

Daiji

Daiji are the characters used for amounts on contracts, receipts, and gift envelopes, so that no stroke can be added later to change the number. The daiji written here replace 一, 二, 三, and 十 with 壱, 弐, 参, and 拾, and keep 四 to 九, 百, 千, and 万 as they are, which is the form in common use today.

• In daiji, the 壱 before 拾, 百, and 千 is never left out. 10 is 壱拾 and 1000 is 壱千, so that nothing can be written in front
• An amount on a receipt has 金 before it and 円也 after it, as in 金壱万円也

Daiji, older characters

This older form of daiji also replaces 四 to 九, 百, 千, and 万:

• 肆 (4), 伍 (5), 陸 (6), 漆 (7), 捌 (8), 玖 (9)
• 佰 (100), 阡 (1000), 萬 (10000)

Digits with 万 and 億

Only 万, 億, 兆, and 京 mark the groups of four digits, and the digits themselves stay Arabic. This style is common in news and statistics: 123456789 becomes 1億2345万6789.

What can be entered

• Arabic digits — Full-width digits (１２３４５) are read too. A comma may only separate groups of three digits, as in 12,345
• Kanji numerals — Both the form with places (二千二十六) and the digit-by-digit form (二〇二六) are read. The symbol ○ and 零 are read as 0 in place of 〇. Forms that write the one, such as 一十 and 一千万, are read too
• Daiji — Besides 壱, 弐, 参, 拾, the older 肆, 伍, 陸, 漆, 捌, 玖, 佰, 阡, 萬 and the variants 壹, 貳, 參, 陌, 仟 are read
• Mixed forms — Arabic digits with kanji places, such as 1万2345, 1億2千万, and 3万5千, are read
• Amounts — A leading 金 and a trailing 円, 円也, or 也 are dropped. 金壱万円也 is 10000
• Spaces — Spaces before, after, and inside the input are removed

When an error appears

• cannot be read as part of a number — The input has a character that is not a digit, a kanji numeral, or a place. The 年 in 2026年, characters such as 廿 (20) and 卅 (30), and circled digits such as ⑩ are not read
• up to the 京 place — The number has more than 20 digits after leading zeros are dropped, or uses a place from 垓 up. Input such as 000000000000000000001, which is longer than 20 digits only because of leading zeros, is read as 1
• whole numbers from 0 up — The input has a sign or a decimal point, as in -5, 1.5, or 三・五
• A comma is in the wrong place — A comma does not separate groups of three digits, as in 1,2 or 12,34
• There is no number before — Nothing comes before 万, 億, 兆, or 京, as in 万 alone or 一億万
• The number before ... is 0 — The number before 万, 億, 兆, or 京 is 0, as in 1億0万 or 一億〇〇〇〇万. Leave out a place that is 0 and enter 1億
• There is no number — Nothing is left once 金, 円, and 也 are dropped from an amount, as in 金円也 or 金 alone
• The places are out of order — The places are not largest first, or one comes twice, as in 十百 or 一万一億
• The kanji numeral cannot be read — A 〇 is mixed into the form with places (二千〇二十六), two digits come before a place (一二百), or the number after 万 is 10000 or more (1万23456). Input such as 1万00001, which has four digits or fewer once leading zeros are dropped, is read as 10001

FAQ

Which is right, 一千万 or 千万?

Both are used. Amounts and official documents often write 一千万 so that the number of digits cannot be misread, and this converter writes 一千万. Everyday writing often uses 千万. Both are read as 10000000.

Why is 10000 not written just 万?

Unlike 十, 百, and 千, the 一 before 万, 億, 兆, and 京 is not left out. 10000 is 一万 and 100000000 is 一億. An input of 万 alone is reported as having no number before it.

What is the difference between 〇 and 零?

〇 stands for a 0 digit in the digit-by-digit form, as in 二〇二六. 零 is used when the number itself is zero, and it is also the daiji for zero. This converter writes 0 as 零 in kanji numerals and as 〇 digit by digit.

Which form should be used for years in vertical text?

Years, street numbers, and phone numbers are usually written digit by digit (二〇二六年). Amounts and quantities are usually written with places (二千二十六円). Neither is a fixed rule, so keep one form throughout a document.

Are 四 and 百 left as they are in daiji?

In the daiji written here, only 一, 二, 三, and 十 are replaced, and 四 to 九, 百, 千, and 万 stay as they are. This is the form in common use today. To replace them too, use the "Daiji, older characters" row.

Can the numbers in a passage of text be turned into kanji?

No. "Convert a list" converts a list with only one number on each line. A line with other characters, such as 2026年, is counted as not converted. In running text, years and numbers are usually written digit by digit while amounts and quantities are written with places, and which form each number should take cannot be decided automatically.

Can decimals or negative numbers be converted?

No. Only whole numbers from 0 up can be converted.

Can the reading in hiragana be shown?

No. Readings change with the combination of digit and place, as in 三百 (sanbyaku) and 六百 (roppyaku), so this converter only handles how the number is written.

Is my input saved?

No. Everything is converted in your browser, and nothing you enter is sent to a server. Reloading the page clears the input and restores the example 12345.