Japan Postal Code to Address (with Romaji)
Look up a Japanese address from a 7-digit postal code, with the official Japan Post romaji form for English addresses. Searched in your browser.
FAQ
Where does the data come from?
Japan Post's public postal code data (UTF-8 edition updated 30 Sep 2026; romaji edition updated 18 Jun 2025).
Are business-specific postal codes included?
No. Only area (town) postal codes are included.
Some addresses have no romaji
The romaji file is updated less often, so newer addresses may have none. We do not generate it.