I don't know my My Number Card password.
Even if you don't know your My Number password, you can verify your identity by taking a photo of your face. If this method is acceptable, please select "I don't know my password" in the app and proceed. If you wish to proceed without taking a photo of your face, please consider the My Number Card password reset steps below.
If you have forgotten your signature password (6-16 alphanumeric characters):
If you have forgotten your My Number Card's signature electronic certificate PIN (6-16 alphanumeric characters), you will need to apply for reset at the municipal office where you are registered as a resident. For details, please contact your municipal office. Alternatively, if you can use your My Number Card user authentication PIN (4-digit number), you can reset it using the smartphone app and a convenience store kiosk terminal.
How to Reset Your Signature Password at a Convenience Store
https://www.kojinbango-card.go.jp/220208_1/
If you enter your My Number Card signature password (6 to 16 digits) incorrectly five times in a row, the password will be locked, and you will be unable to use the corresponding electronic certificate. However, if your My Number Card user authentication password (4-digit number) is still valid, you can reset it using a smartphone app and a convenience store kiosk terminal.
For detailed instructions on how to use your smartphone and a convenience store kiosk terminal to reset your My Number Card signature password (JPKI PIN reset), please check the following website.
Public Personal Authentication Service Portal Site: "Resetting Your Signature Password at a Convenience Store"
https://www.jpki.go.jp/jpkiidreset/howto/index.html
Reference Site: https://faq.myna.go.jp/faq/show/4140?category_id=6&site_domain=default
If you have forgotten your My Number Card user authentication password (4-digit number)
If you have forgotten your My Number Card's card information input assistance PIN (4-digit number), you will need to apply for reset at the municipal office where your resident registration is located. For details, please contact your municipal office.
Reference Site: https://faq.myna.go.jp/faq/show/4141?category_id=6&site_domain=default
If you have forgotten your signature password (6-16 alphanumeric characters):
If you have forgotten your My Number Card's signature electronic certificate PIN (6-16 alphanumeric characters), you will need to apply for reset at the municipal office where you are registered as a resident. For details, please contact your municipal office. Alternatively, if you can use your My Number Card user authentication PIN (4-digit number), you can reset it using the smartphone app and a convenience store kiosk terminal.
How to Reset Your Signature Password at a Convenience Store
https://www.kojinbango-card.go.jp/220208_1/
If you enter your My Number Card signature password (6 to 16 digits) incorrectly five times in a row, the password will be locked, and you will be unable to use the corresponding electronic certificate. However, if your My Number Card user authentication password (4-digit number) is still valid, you can reset it using a smartphone app and a convenience store kiosk terminal.
For detailed instructions on how to use your smartphone and a convenience store kiosk terminal to reset your My Number Card signature password (JPKI PIN reset), please check the following website.
Public Personal Authentication Service Portal Site: "Resetting Your Signature Password at a Convenience Store"
https://www.jpki.go.jp/jpkiidreset/howto/index.html
Reference Site: https://faq.myna.go.jp/faq/show/4140?category_id=6&site_domain=default
If you have forgotten your My Number Card user authentication password (4-digit number)
If you have forgotten your My Number Card's card information input assistance PIN (4-digit number), you will need to apply for reset at the municipal office where your resident registration is located. For details, please contact your municipal office.
Reference Site: https://faq.myna.go.jp/faq/show/4141?category_id=6&site_domain=default