About
This app allows users to create and store electronic powers of attorney, compliant with Japanese law. It supports various authorization methods and integrates with government procurement systems. Requires a My Number Card for secure login and signing.
What's New in マイナトラスト － 電子委任状の作成と登録保管／GEPS対応
1.0.13
May 11, 2026
SSL証明書処理の改修を行いました。
Developer apps
FAQ
What is マイナトラスト?
マイナトラスト is an application that allows you to create and store electronic powers of attorney, in accordance with the Electronic Power of Attorney Act. It is certified by the Ministry of Internal Affairs and Communications as an electronic power of attorney handling business operator.
What are the requirements to use マイナトラスト?
To use マイナトラスト, you will need a My Number Card with both the User Certificate and Signature Certificate electronic certificates, along with their respective PIN codes (passwords). The app also requires iOS 13.6 or later and a smartphone equipped with NFC for My Number Card reading.
Does マイナトラスト support multiple authorization methods?
Yes, マイナトラスト supports two methods for electronic powers of attorney: the Grantor Record File method (for creation, storage application, reference, and revocation) and the Handling Business Operator Record File method (for reference and revocation, with creation and storage application requiring a separate application).
How does マイナトラスト integrate with government systems?
マイナトラスト is compatible with the Government Electronic Procurement (GEPS) portal. By creating an electronic power of attorney beforehand and logging into the GEPS portal with your My Number Card, authorization information can be linked.
Can I create an electronic power of attorney for someone else to act on my behalf?
Yes, as a corporate representative or sole proprietor, you can create an electronic power of attorney to grant authorization to employees or professionals like judicial scriveners or tax accountants. The app uses SMS for communication between the grantor and the authorized recipient.
How can I check the status of my electronic power of attorney application?
マイナトラスト displays the status of your electronic power of attorney applications. You can check the progress based on different stages, such as waiting for the recipient's content confirmation or the grantor's electronic signature.
Is there a cost associated with using マイナトラスト?
The app download and basic usage are free. However, fees will be incurred upon completion of the electronic power of attorney registration and storage application, and based on the storage period, as detailed in the in-app fee table. Communication charges for downloading and using the app are the user's responsibility.
How often is マイナトラスト updated?
The app was last updated on May 11, 2026, with version 1.0.13. While the specific update frequency is not detailed, this indicates ongoing maintenance and development.