Japan Address & Identity Data Generator
Generate Japan addresses and identities in your browser: correctly formatted postal codes, phone numbers and My Number, with the administrative division and city always taken from the same data record so they can never disagree. Every value is synthesised by algorithm and corresponds to no real person, address or account.
Japan at a glance
- Nationality
- Japanese
- Official language
- Japanese
- Currency
- JPY ¥
- Calling code
- +81
- Postal code
- 3 digits - 4 digits · Public postal data
- National ID
- My Number
- Format
- 12 digits
- Check digit
- Official check digit
- Top-level division
- Prefecture
- Divisions
- 47
- Cities covered
- 1894
Japan My Number format and check digit
Japan's My Number uses the format 12 digits, and the official check-digit algorithm is implemented — a number this tool generates passes the same validation the real one would.
Japan postal code rules
Japan postal codes use the format 3 digits - 4 digits. The divisions and cities come from public postal data, so a code's prefix matches the country's actual districts.
Time zone of Japan
Japan keeps time in Asia/Tokyo, UTC+09:00 relative to UTC.
How this is counted: the city zones come from GeoNames' `timezone` field, the main zone is the one holding most of the recorded population, and the largest city behind that choice is Tokyo.
What Japan data is good for
Four jobs come up again and again with Japan records: testing signup and checkout forms, where an address, My Number and phone number in the local format exercise required-field, length and conditional validation; seeding a staging database so screens and API responses have something to render; filling a third-party form that asks for personal details without handing over your own; and demos, screenshots and design mockups, which need records that look real but belong to nobody.
Example address
- Full name
- 藤本弘子
- Gender
- 男性
- Date of birth
- 1962-03-26
- Full address
- 849-1300, 佐賀県鹿島市大字井手51番地27号, 日本
- Postal code
- 849-1300
- Phone
- +81 70 1970 9506
- National ID
- 016613027002
- [email protected]
- Username
- pebbleflint89
The record below is synthesised to show field formats. It is not real information.
Generate Japan data now
Generate Japan data nowLawful use of Japan data
Every Japan address and My Number here is synthesised by algorithm and belongs to no real person, address or account: the 47 divisions and 1894 cities on this page are real place names, while the house numbers, names and numbers are not. The postcode follows the country's real format. The generator guarantees only that the number follows the country's format (the number carries a real check digit and passes the country's format and checksum checks), which does not mean it will not collide with a real person's, so use these records for testing, development, demos and privacy-preserving form filling, never to defraud anyone, pass as another person or circumvent the law. Values are generated locally and never uploaded; the privacy policy and disclaimer linked in the footer carry the full statement.
Frequently asked questions
Are Japan test addresses real?
No. Every field is synthesised by an algorithm and corresponds to no real person, address or account. The divisions and cities are real names; the house numbers, names and ID numbers are not.
Does the generated My Number pass validation?
Japan's My Number uses the format 12 digits, and the official check-digit algorithm is implemented — a number this tool generates passes the same validation the real one would.
Can the postal code and city disagree?
No. The division, city and postal code come from one data record: a division is chosen, then a city within it, then a code built from that division's real postal rules.
Can I reproduce the same record?
Yes. The identity key determines every random draw, so the same key, country and gender always produce an identical record — which is what makes it usable as a fixed sample in automated tests.
These answers describe what this site's data and algorithms actually do. Nothing here is a guess.