Japan Address Generator
Generate Japanese address-format samples for testing localized forms, postal-code fields, prefecture labels, country selectors, address display order, QA automation, product demos, and seed data. Japan address samples help teams catch layout and validation issues that do not appear with US-only test data.
A Japanese fixture for town names and address order
Compare this prefecture, municipality and town across the native and Romanized displays. Keep the town component with its original municipality; changing the interface language is not a translation service for arbitrary Japanese addresses.
Current fixture coverage: 47 selectable regions · 141 locality fixtures
- Street
Asahigaoka 1-1- City
Sapporo Shi Chuo Ku- Region
Hokkaido (01)- Postal code
064-0941
Expected full-address output
Asahigaoka 1-1, Sapporo Shi Chuo Ku, Hokkaido 064-0941, Japan
Download this record: JSON CSV
Treat the seven-digit postal value and its displayed hyphen as text. Test full-width input normalization separately from preserving an exported fixture.
What to check
- Retain the complete municipality and town, including ward text where present, instead of shortening every city to one label.
- Compare the full-address ordering in Japanese and Romanized output without converting the postcode to a number.
A change to catch in a preservation test: postalCode
- Original value
064-0941- Changed value
0640941
A preservation test should detect this change. Test intentional normalization against a separate contract.
What this version does not cover
Each prefecture has three municipality/town fixtures. Native and Romanized display uses these fixtures; it does not translate arbitrary addresses or add building/room fields.
Product scope reviewed: . Fixture methods and limits
Japan regions and all 47 prefectures
Choose any of Japan's 47 prefectures, or keep Random selected. Each prefecture has three town-area fixtures (141 in total). These eight geographic groups combine Kyushu and Okinawa; they are navigation groups, not an extra address field.
Hokkaido
Hokkaido
Tohoku
Aomori, Iwate, Miyagi, Akita, Yamagata, Fukushima
Kanto
Ibaraki, Tochigi, Gunma, Saitama, Chiba, Tokyo, Kanagawa
Chubu
Niigata, Toyama, Ishikawa, Fukui, Yamanashi, Nagano, Gifu, Shizuoka, Aichi
Kansai
Mie, Shiga, Kyoto, Osaka, Hyogo, Nara, Wakayama
Chugoku
Tottori, Shimane, Okayama, Hiroshima, Yamaguchi
Shikoku
Tokushima, Kagawa, Ehime, Kochi
Kyushu & Okinawa
Fukuoka, Saga, Nagasaki, Kumamoto, Oita, Miyazaki, Kagoshima, Okinawa
Japanese address structure and practical checks
Seven-digit postal codes
Keep the XXX-XXXX format and leading zeros. A postal code normally identifies a town area, not an entire city. Keep each town and postcode paired.
Prefecture and municipality
Japan has 47 prefectures: one to, one do, two fu and 43 ken. Preserve the city and ward together in designated cities, rather than using a ward name alone.
Town and block numbers
Local addresses proceed from prefecture to municipality, town, number and building. Not every address has a chome; residential numbering and land-lot numbering differ. Our Street field combines a town with synthetic numbers, without separate building or room fields.
Native and Romanized display
Chinese and Japanese interfaces use Japanese place names in large-to-small order. English uses Japan Post Romanizations in street-to-prefecture order. Generating after a language change creates a new record, not a translation of the previous one.
Telephone format
International presentation uses +81 and drops the domestic leading zero. Phone samples are not checked for ownership, active service, calls or SMS reception.
Try a concrete workflow
Choose Hokkaido and generate a record; check leading zeros and the complete municipality. Then select Okinawa, save both samples and export CSV/JSON. Verify that characters, towns and postcodes survive the round trip.
Prefecture coverage is not exhaustive city or street coverage. Geographic fixtures come from Japan Post's June 2025 Romanized postal data. Generated numbers and profiles are not verified delivery or personal records. Source: Japan Post postal data
How this page was checked · 2026-09-23
What we checked
- All 47 prefectures and 141 municipality, town and postal-code fixtures
- Seven-digit postal-code presentation and leading zeros
- Native and Romanized address order
- Names, phone samples and block numbers are generated; no building or room fields are produced
- The map link may resolve to a postal area rather than the synthetic block
Primary references
- Japan Post: How to write international labels
- Japan Post: Postal-code search
- Japan Post: Romanized postal-code data (June 2025)
Data boundary: Format references do not certify this synthetic record for delivery. Read the data methodology and editorial standards
FAQ
Does the generator cover all 47 prefectures?
All 47 can be selected, with three maintained municipality/town fixtures per prefecture. That is not a complete postcode or street directory.
Does changing language translate any address I paste?
No. Native and Romanized values come from the maintained fixtures; this page does not translate arbitrary input.
Are building names and room numbers separate fields?
No. Add separate building/room scenarios when testing those requirements rather than assuming the compact generated street exercises them.