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BENGO4.COM, INC.

About this app

- Contracts are now in the era of cloud signing -
CloudSign is the electronic contract service with the No. 1 market share in Japan, with over 2.5 million companies using it.

This is an app that allows you to create an electronic signature using the electronic certificate in your My Number card. This application can only be used if the My Number Card signature is specified by the sender. After checking the documents on CloudSign, use this app to sign your My Number card.
*My Number Card signature requires the use of Cloud Sign in addition to this app.


・Reading the QR code
・Enter the electronic certificate password
・Reading my number card


1. Check and agree to the contents of the document on your computer or smartphone browser.
2. Start this app and link Cloud Sign and this app by reading the QR code.
3. In this app, enter the password for your electronic certificate and hold your My Number card over your smartphone.
4.My Number Card signature is completed.


・I want to digitize the conclusion of contracts that previously required a seal certificate or registered seal.
・I want to prove that the document is signed by the person in authority, such as when circulating minutes.

What’s new

Android 14を対象に追加し、Android9を対象から削除しました。