This app allows users to view and verify the validity of digital certificates on their My Number Card using an iPhone. It also provides functionality to change passwords and receive notifications for certificate expiration.
2.5.1
February 4, 2026
住所等提供同意状況の表示を一部変更しました。
JPKI利用者ソフト is an application that allows you to use the digital certificates (signature and user certificates) stored on your My Number Card. It enables you to check the validity and expiration of these certificates directly on your iPhone.
No, this application cannot be used to connect your iPhone to a PC as a card reader. Its primary functions are to view and manage the digital certificates on your My Number Card.
The app provides a password change function for both the signature digital certificate (6-16 alphanumeric characters) and the user digital certificate (4 digits). Incorrect entries can lead to password locks.
If you enter the signature password incorrectly 5 times consecutively or the user certificate password 3 times consecutively, your password will be locked. You will need to visit your local municipal office to unlock it.
You can begin the renewal process for your digital certificates at your local municipal office starting three months before their expiration date. Expired certificates will become invalid and cannot be used for services.
JPKI利用者ソフト requires iOS 13.0 or later and an iPhone 7 or later with NFC capabilities. It is compatible with iPhone and iPod devices.
The latest version of JPKI利用者ソフト is 2.5.1, which was last updated on February 4, 2026. Updates typically address performance improvements and bug fixes.
Based on 381 ratings, JPKI利用者ソフト has an average rating of 2.0 stars. This suggests that users have experienced significant issues or dissatisfaction with the application's performance or features.
