This app is provided by Moka City. The URL of Moka City is as follows.
https://www.city.moka.lg.jp/

This app is used in the "Moka City Online Application System".
By using this system, you can easily apply for administrative procedures such as requesting a resident's card from the browser of your PC or smartphone.
In addition, with this app, you can access your My Number card, read your My Number, etc., and electronically sign your application.

The "My Number Card" is a personal card that can be obtained by persons legally residing in Japan.
Please refer to the following sites.
https://www.cao.go.jp/bangouseido/card/index.html
https://www.kojinbango-card.go.jp/

To use this app, you need a model equipped with a My Number card and an NFC reader.
This is to access the IC chip of the My Number Card.