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.
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 ยท 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: AddressLab checks field structure and format against the references below. Generated records remain synthetic test fixtures: a plausible format does not prove that a house number, building, person, phone number, or delivery point exists. Use an official address-validation service or recipient-confirmed data for production delivery. Read the data methodology and editorial standards
FAQ
Why use Japan-specific address test data?
Japan address formats can reveal issues with region fields, postal-code placement, localized labels, and display order.
Can I generate a random Japanese address sample?
Yes. AddressLab can generate Japanese address-format samples for testing forms, QA scripts, demos, and localization workflows.
Are these real Japanese addresses?
No. They are synthetic records for testing forms, prototypes, and QA workflows.
Does AddressLab support Japanese UI text?
Yes. The site includes a Japanese interface and Japanese address sample pages.