1. Konami official site
https://my.konami.net/

① Click Login

② Enter Konami ID and password.

③ Choose next time

④ Choose Update e-mail address.

⑤ Click Konami account E-mail address

⑥ Enter an E-mail address your own,then Enter verification code you got.

⑦ Change Konami account password
Click Security then Click your password.

⑧ Enter current password and your new password,then click update.