If you have ever filled out a Japanese bank form, looked at a formal contract, or noticed the numbers on Japanese banknotes, you may have seen characters like 壱 (ichi), 弐 (ni), and 参 (san) instead of the familiar 一, 二, 三. These are daiji (大字) — the formal numeral forms used in legal and financial documents to prevent fraud.
This guide explains when and why Japan uses two different sets of kanji numerals, covers the full daiji chart, and shows you exactly where you will encounter them in daily life.
At a Glance: Standard vs. Formal Numerals
| Number | Standard (普通字) | Formal Daiji (大字) |
|---|---|---|
| 0 | 零 (rei / zero) | ○ (maru) informal / 零 formal |
| 1 | 一 (ichi) | 壱 (ichi) |
| 2 | 二 (ni) | 弐 (ni) |
| 3 | 三 (san) | 参 (san) |
| 4 | 四 (shi / yon) | 四 (same — not changed) |
| 5 | 五 (go) | 伍 (go) |
| 6 | 六 (roku) | 六 (same — not commonly changed) |
| 7 | 七 (shichi / nana) | 七 (same) |
| 8 | 八 (hachi) | 八 (same) |
| 9 | 九 (ku / kyuu) | 拾 (ku) |
| 10 | 十 (juu) | 拾 (juu) — also 弐拾 |
| 100 | 百 (hyaku) | 百 (same) |
| 1,000 | 千 (sen) | 仟 (sen) |
| 10,000 | 万 (man) | 萬 (man) |
YukaI saw 壱萬円 on a deposit slip at the bank and had no idea what number it was!
ReiThat’s 10,000 yen! 壱 = 1 and 萬 = 10,000. Daiji are used on all bank slips and legal documents to prevent someone from adding extra strokes to change the amount.
What Are Daiji (大字)? The Anti-Fraud Number System
The word daiji (大字) literally means “large characters.” These alternative kanji for numbers have more strokes than the standard forms, making it much harder for someone to fraudulently alter an amount by adding a stroke or line.
For example:
- 一 (ichi) — just one horizontal stroke. A fraudster could easily add strokes to make it look like 三 (3), 十 (10), or even a different character.
- 壱 (ichi, daiji) — a complex character that cannot easily be altered.
- 二 (ni) — two horizontal strokes. Could be altered to 三 (3).
- 弐 (ni, daiji) — much more complex; alteration is impractical.
Japan has used daiji since the Nara period (8th century), when government documents required tamper-proof numerals. The practice continues today in banking and legal documents.
Where You Will See Daiji: Real-Life Situations
| Document Type | Numeral Convention |
|---|---|
| Bank deposit/withdrawal slips (入金・出金伝票) | Always daiji for amounts over ¥10,000 |
| Checks (小切手) | Daiji required by law; standard kanji check will be rejected |
| Legal contracts (契約書) | Monetary amounts always in daiji |
| Invoices (請求書) | Often daiji for large amounts |
| Court documents (裁判文書) | Standard practice for all numerals |
| Deed transfers / real estate (不動産登記) | Daiji throughout |
| Everyday menus, signs, prices | Standard numerals 一二三 or Arabic 1 2 3 |
| Casual text, social media, homework | Standard numerals or Arabic |
The Full Daiji Chart with Stroke Comparison
Most Important Daiji to Know
These are the characters you are most likely to encounter on forms:
| Daiji Character | Standard Form | Why It Matters |
|---|---|---|
| 壱 (ichi) | 一 | The most commonly altered numeral; daiji is essential |
| 弐 (ni) | 二 | Easily confused with 三 in standard form |
| 参 (san) | 三 | Complex daiji prevents stroke addition |
| 俯 (go) | 五 — some contexts | Less common but appears on old documents |
| 拾 (juu) | 十 | Standard 十 is a cross shape — easy to modify |
| 仟 (sen) | 千 | Thousands separator on formal invoices |
| 萬 (man) | 万 | Most important for everyday banking (10,000 yen unit) |
YukaSo if I need to write a check or fill in a bank form, I need to use these complex characters instead of the ones I learned?
ReiExactly! For bank forms and checks, always use daiji. Fortunately, most modern bank forms have printed guides, and many allow you to write in Arabic numerals (1, 2, 3) for the amount — you just need to double-check what the form asks for.
How to Read Daiji: Practice with Real Examples
Try reading these amounts. Answers are given below.
- 壱萬五千円 (ichimangosenyen)
- 参拾弐萬円 (sanjuunimanen)
- 仟弐百円 (senninohyakuyen)
Answers
- ¥15,000 — 壱=1, 萬=10,000 + 五=5, 千=1,000 = 15,000
- ¥320,000 — 参=3, 拾=10 = 30 (units of 10,000) = 300,000 + 弐=2, 萬=10,000 = 20,000 total: 320,000
- ¥1,200 — 仟=1,000 + 弐=2, 百=100 = 200 total: 1,200
Daiji vs. Standard Kanji: Common Mistakes
| Mistake | Solution |
|---|---|
| Using standard numerals on a check | The check will be rejected; use daiji for all monetary amounts on checks |
| Confusing 壱 (ichi) with 壳 (tsuba, a unit) | They look similar; 壱 has 弓 at the top; double-check your stroke count |
| Writing 萬 (man) as 万 | Acceptable on most forms but not on checks; learn 萬 for formal use |
| Forgetting to write 零 (rei) for zero | On bank forms, blank spaces read as zero; write 零 explicitly to avoid ambiguity |
Quick Quiz: Daiji Recognition
Match the daiji to its value. Answers below.
- 参 = ? (a) 1 (b) 2 (c) 3
- 萬 = ? (a) 100 (b) 1,000 (c) 10,000
- 仟 = ? (a) 100 (b) 1,000 (c) 10,000
- 拾 = ? (a) 5 (b) 10 (c) 100
- 壱 = ? (a) 1 (b) 2 (c) 3
Answers
- (c) 3 — 参 is the daiji for san (3)
- (c) 10,000 — 萬 is the daiji for man
- (b) 1,000 — 仟 is the daiji for sen
- (b) 10 — 拾 is the daiji for juu
- (a) 1 — 壱 is the daiji for ichi
Have you ever seen daiji on a Japanese form or banknote? Which character confused you most? Share in the comments below!
Want to practice reading Japanese numbers and forms with a native speaker? italki connects you with Japanese tutors for one-on-one lessons tailored to your level.
Keep Learning
Expand your number knowledge with these related guides:
Comments