On the Manage e-mail address screen, press “Resend registration e-mail ” in the e-mail address field marked “Your registration has not been completed.” The message will be sent in about a few minutes to the initially registered e-mail address.
(Manage e-mail address screen)
<For smartphone>
After logging in, select Top page > Hamburger icon (mark with three lines) at the upper right hand corner of the screen > Your profile > “List” of E-mail addresses
<For PC>
After logging in, select Top page > Account information at the top of the screen > Your profile > “List” of E-mail addresses