The new sign-in method requires your Yahoo! JAPAN ID that is linked to your Yahoo! JAPAN Business ID (Business ID).
Sign-in using the registered password is no longer available.
Link your IDs from the "Yahoo! JAPAN ID linkage" page.
To link your IDs, you need to know the registered email address and phone number.
If you aren't sure, you can find them in the Business Manager. Sign in using a one-time passcode or ask the administrator (a user who has administrator permission or tool access permission).
Enter a passcode sent to the email address you registered for your Business ID.
We offer sign-in using one-time passcodes for a limited time for advertisers who need time to link IDs.