This is a repository that stores snapshots of Japan Post's zip code data.
The original download page reuses the same URLs without version control, making it difficult to track changes. To ensure reproducible builds, this repository preserves snapshots of the zip code data with clear versioning.
Zip code data for offices (事業所 / Jigyosho).
- URL: https://www.post.japanpost.jp/service/search/zipcode/download/office/zip/jigyosyo.zip
- Date: 2026-05-29
- Size: 775070
- SHA256: be3a3e10caff39b7f572380e5349439fbd7acfd07df3398888f68b0e43962d19
Zip code data for addresses in all prefectures (県 / Ken).
- URL: https://www.post.japanpost.jp/service/search/zipcode/download/kogaki/zip/ken_all.zip
- Date: 2026-05-29
- Size: 1694790
- SHA256: 636d223d5038d2333def34502352872368e3bbd88b19e8fe62ef2b0805f0192b
The UTF-8 version of ken_all.zip.
- URL: https://www.post.japanpost.jp/service/search/zipcode/download/utf/zip/utf_ken_all.zip
- Date: 2026-05-29
- Size: 2033105
- SHA256: 0f10390c1cb4612af61469ac3c6b7be1d6cbcc290b3b29220a2264721476628c
https://www.post.japanpost.jp/zipcode/dl/jigyosyo/readme.html
大口事業所個別番号データに限っては日本郵便株式会社は著作権を主張しません。 自由に配布していただいて結構です。日本郵便株式会社への許諾も必要ありません。
(English translation as a reference) Regarding the Large-scale Business Establishment Individual Number Data, Japan Post Co., Ltd. does not assert any copyright. You are free to distribute it. No permission from Japan Post Co., Ltd. is required.
https://www.post.japanpost.jp/zipcode/dl/readme.html
https://www.post.japanpost.jp/zipcode/dl/utf-readme.html
郵便番号データに限っては日本郵便株式会社は著作権を主張しません。 自由に配布していただいて結構です。
(English translation as a reference) Regarding the postal code data, Japan Post Co., Ltd. does not assert any copyright. You are free to distribute it.