How to use Japan postal code lookup
- 1
Type a code or an address
Enter 3 to 7 digits of a code, or an address from the prefecture or municipality down, in kanji, kana or romaji.
- 2
Pick the match
Results update as you type; choose a municipality chip if the name exists in several prefectures.
- 3
Check the notes
If a town has more than one code, the note tells you the 丁目 or lot numbers each one covers.
- 4
Copy what you need
Copy the code, the address in Japanese, or the address in English for a foreign form or a parcel from abroad.
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About Japan postal code lookup
Every Japanese address starts with a seven-digit postal code (郵便番号), written after the 〒 mark: 100-0001 is Chiyoda in Chiyoda-ku, Tokyo. Online shops, delivery slips, bank and phone contracts and city-hall forms all ask for it, and many fill in the address once the code is known, so getting it right saves retyping and returned parcels.
Type a code, or the start of one, to see the addresses it covers. Type an address to find its code: the prefecture can be left out, the town can be written in kanji or kana, full-width digits and the variants ヶ, ケ and が in names such as 霞が関 all match, and block numbers after the town (千代田1-1, 銀座4丁目) are ignored. A town typed on its own, such as 銀座, lists every municipality that has one. Addresses in romaji work too, in Japanese or English order.
Each result shows the address in kanji with its reading, and in English in the order foreign forms expect it (Chiyoda, Chiyoda-ku, Tokyo 100-0001). Notes say when a town has several codes depending on the 丁目 or lot number, when one code covers several towns, and which code to use when a town isn't listed.
The data is Japan Post's national list of town codes, about 124,000 entries, refreshed from its download page. The individual codes of large companies, government offices and PO boxes are not included, and the romanized names follow Japan Post's own file, which leaves long vowels out.
Privacy
The search runs in this page: what you type is matched on your device and never sent to a server. The page downloads only the small public data files it needs (the list of municipalities and the code ranges for your search) from this site, and keeps your last search in this browser's local storage.
Features
Both directions
Code to address and address to code, including partial codes and towns without a municipality.
English address
Each result in romaji, smallest unit first, from Japan Post's romanized data.
Kanji, kana or romaji
Readings, full-width digits and spelling variants such as 霞ヶ関 and 霞が関 all match.