Access the latest Japanese zip codes offline. Search by state, city, or keywords, and bookmark frequently used codes. View locations on a map and easily share or save address information.
2.02
July 17, 2026
Updated to new url for downloading data. Support dard mode.
アプリ不具合のご報告ありがとうございます。 調査した結果、日本郵便局がローマ字データをダウンロードするためのURLを変更しましたため、ローマ字情報がダウンロードすることが出来なくました。 この問題を解消するため、アプリを更新しました。最新のアプリをダウンロードして頂いて、もう一度ご確認頂ければ、幸いです。
Yes, Zip Codes of Japan contains advertisements. This is how the app is able to remain free for users.
The zip code data is updated monthly by Japan Post Service Co., Ltd. Users are advised to download the latest data once every month to ensure accuracy.
Yes, the core functionality of finding zip codes works offline after the initial data download. However, viewing zip code locations on a map requires an internet connection.
For each zip code, you can find the current zip code, the old zip code, and the full address. If Romaji data is downloaded, addresses will also be available in Romaji.
You can search by state and city, or by inputting the zip code, kanji, kana, or free words. A space is required when searching with multiple keywords.
Yes, you can bookmark your often-used zip codes. These bookmarks can also be saved to iCloud for easy access across devices.
Zip Codes of Japan is available for iPhone, iPad, and iPod devices. It is rated for ages 4 and up.
The latest version of Zip Codes of Japan, version 2.02, was last updated on July 17, 2026.
