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: 2026-06-30
- Size: 775361
- SHA256: 83c263ec55338919e7433ba086de028cf5e46946263bfda8a334d5a7bb4e2bfc
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: 2026-06-30
- Size: 1694787
- SHA256: 4f94ccc3ab2e8f6fa1d02f7eb484d5f5e8a3f8bbf4f8b26b46f4c4a3f78ab700
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: 2026-06-30
- Size: 2033139
- SHA256: 4f89fc08caaa2d5004faea3b24356ae924e9f29033a8a2c8ab420aadb6df3f35
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.