Japan Test Data Generator
Create synthetic Japan profiles for forms, demonstrations and localization tests.
Preparing your test data…
Your first record will appear here shortly.
Copy individual values or export the entire result.
Synthetic identities; domains, addresses and numbers may coincide with real values. Do not contact or send payments.
Testing Japan interfaces
This locale uses ja definitions for names and presentation formats. Test text lengths, input handling, exports and Unicode support. City, region and available postal codes come from the same GeoNames locality. See the generated quality note for postal coverage; street and house number remain synthetic.
Testing Japan forms
Use a Japan profile as a starting point for form tests. This guide focuses on block components and postal hyphens. Add the deliberate fixture below to make that behavior repeatable.
Generator locale: ja. Suggested application display locale: ja-JP. These are separate settings; this guide does not change the generator’s output.
Address reference for Japan
Japanese postcodes group seven digits as three plus four with a hyphen. The UPU guide describes area, block and building components and different ordering for Japanese and Latin-script labels.
Block components and postal hyphens
A block-building string should not be reduced to an integer or interpreted as a date. Add Japanese input manually to test your application beyond the generator’s Latin-script output.
A deliberate regression fixture
Editorial regression fixture — shape and preservation tests only country: JP postal_shape: "123-4567" block_building: "2-8-16" original_label: "さくら" expected: Retain both structured strings and the Japanese label without date coercion.
These editorial inputs are for controlled tests. They are not verified addresses, guaranteed unassigned contact details, or automatically generated examples.
- 01
Fixture assertion
Retain both structured strings and the Japanese label without date coercion.
- 02
Original text
Add the hand-written input “さくら” and compare it after saving, copying and CSV import. It is an editorial string, not promised generator output.
- 03
Locale and coverage
Test ja-JP display separately from the stored date-only value. Keep the generated locality coverage note with the record; the address reference does not expand Genory’s dataset.
Address reference: UPU addressing guide: Japan. Reviewed 4 October 2026. Postal presentation rules are not universal rules for storing personal names.