🏢 Random Japanese Address Generator

Developers and testers often need realistic Japanese addresses to fill forms, seed databases, or demo a checkout page. Hand-typing plausible addresses with correct postal-code prefixes is tedious, and using real addresses raises privacy concerns. This generator creates fictional addresses that look and behave like real ones.

Every generated address follows the correct Japanese structure: prefecture → city → town → block/building, with a 7-digit postal code whose first two digits match the chosen prefecture (for example, a Tokyo address gets a code starting with 10–20). A matching name with kana reading (ふりがな) is generated alongside, so the result works for both name and address fields. The kana follows the name on the same line, mirroring how Japanese forms ask for name and furigana together.

The prefix-to-prefecture rule is the backbone of the generator:

All locations are invented combinations - a real street name in one city may be combined with a different block number, and names are random combinations of common Japanese surnames and given names. Nothing generated here maps to a real person's mailbox. For legitimate address work, combine with our address formatter and verify codes in the postal code lookup.

The generator picks a random prefecture, then one of several sample cities/wards for that prefecture, then a random block and building name, and finally a postal code built from the prefecture's real prefix plus random digits.

The block numbers use the 丁目-番-号 pattern (e.g. 3丁目2-7), which is how real Japanese addresses work. The name generator combines from a pool of surnames (佐藤, 鈴木, 高橋...) and given names (太郎, 美咲, 健太...) and produces the kana reading automatically from a small lookup. Because every element is drawn randomly, each click produces a different address - perfect for seeding test databases or demoing forms. The quantity option lets you batch-generate up to 20 addresses at once, each on its own line, ready to paste into a CSV or test fixture. When you need the reverse direction or a real address, our postal code lookup and municipality lookup have you covered.

1. Click Generate to create a random Japanese address.
2. Review the result: postal code, prefecture, city, town, building, recipient name and kana.
3. Copy the generated address for your form, test case, or database seed.
4. Generate again for a different combination - every click is fresh.
5. For real addresses, switch to the official postal code search instead.

Are the generated addresses real?

No. The prefecture, city and postal-code prefix are real, but the town/block combinations and building names are invented, and names are random. Nothing generated corresponds to a real person or mailbox.

Why does the postal code match the prefecture?

The generator builds each code from the prefecture's real prefix range (e.g. Tokyo 10–20), so the data passes simple consistency checks like the one in our postal code lookup tool.

Can I use this for production testing?

Yes - it is designed for test data, demo environments and form validation. For integration tests against Japan Post's API, use official sample data instead.

Does it generate the kana (furigana) for names?

Yes - every generated name comes with its hiragana reading, which is required by many Japanese forms and useful for testing furigana validation.

Can I get an English (romanized) version?

The output is Japanese. For a romanized address base, the address formatter tool converts the prefecture to its English name.

How many combinations are possible?

With 47 prefectures, multiple cities per prefecture, dozens of surnames and given names, and random block numbers, the generator produces millions of distinct combinations.

For database seeding, generate several addresses in one session and you will quickly notice the prefecture-prefix consistency - Tokyo always gets a 10–20 code, Okinawa always 90. This consistency is what makes the fake data pass naive validation rules. If your test requires the address to pass a Japan Post lookup, remember that the generated town/block combinations are invented, so use a real address from the postal code search instead. The kana reading is useful for forms that require furigana fields - a common requirement on Japanese signup pages. Building names are generated from a pool of common suffixes (ビル, ハイツ, マンション, 荘) so the results look natural. For a completely different style of test data, our name generator covers non-Japanese names.