How is a Japanese address ordered?

In kanji it runs largest-to-smallest: postal code, then prefecture, city, ward, and finally the chōme-banchi-gō block (for example 1丁目2番3号). The romaji form is conventionally written smallest-to-largest, ending with the prefecture and country.

Is the postal code valid?

It uses the NNN-NNNN seven-digit format with a hyphen, and its first three digits match the postal region of the chosen prefecture and ward. It is format-valid but not a guaranteed live delivery code.

What is chōme-banchi-gō?

It is the Japanese block-and-building numbering scheme: chōme is the district block, banchi is the land number, and gō is the building number. The generator renders them with the kanji units 丁目, 番, and 号 in kanji mode and as a dashed N-N-N in romaji mode.

Can these be used to actually ship something?

No. They are fabricated for testing only. The numbering and postal code are randomized and not a real deliverable address. Use them solely in development and QA.

Does anything leave my browser?

No. The whole address is built locally with no network calls, so your generated test data stays on your device.

Fake Address Generator (Japan)

A fake Japanese address generator produces correctly formatted addresses for Japan in both kanji and romaji, following the local largest-to-smallest ordering and the chōme-banchi-gō numbering scheme. It is meant for developers and testers exercising Japanese e-commerce platforms and address-validation forms that must handle both scripts.

How it works

The generator keeps script, region, and numbering consistent:

An area is chosen, bundling a prefecture, city, and ward in both kanji and romaji, plus the three-digit postal prefix for that region.
A postal code is built in 〒NNN-NNNN format, with the first three digits taken from the chosen region and the last four randomized.
The chōme-banchi-gō block is generated as three numbers and rendered with the kanji units 丁目, 番, and 号 in kanji mode, or as a dashed N-N-N in romaji mode.
The kanji form lists postal, prefecture, city, ward, and block top-to-bottom; the romaji form reverses the order, ending with the prefecture, postal code, and Japan.

Tips and notes

Use the both format to test a form that captures kanji and romaji side by side.
The first three postal digits are region-correct, satisfying common prefecture-and-region checks; the full code is not tied to a specific building.
Generate a batch for seeding databases or import tests; everything runs locally with no network access.