If you have a problem with phone number authentication to start advertising with Yahoo! JAPAN Ads, the following topics may help you.
 I don't get a voice guidance call

I forgot my voice code

If you still have a problem with phone number authentication
I don't get a voice guidance call
Check the phone number is correct. To receive a call again, click "If you did not receive the Yahoo! JAPAN Business ID voice guidance" on "Authentication and password setup." 
I forgot my voice code
You can receive another code. Click "If you did not receive the Yahoo! JAPAN Business ID voice guidance" on "Authentication and password setup."
*Topics regarding "SMS code" applies for the advertisers signed up in Japanese application form.
Code entering issue:

	
Entered wrong voice code (SMS code)

*If you enter wrong codes multiple times, the code will be invalid. Click the link 'If you did not receive the “Yahoo! JAPAN Business ID voice guidance (or SMS code)' to get a new code.
	
Voice code (SMS code) become invalid

The authentication must be processed within 30 minutes. If 30 minutes have passed, get a new code by clicking the link [If you did not receive the "Yahoo! JAPAN Business ID voice guidance"] or [If you don't receive a short message "Yahoo! JAPAN Business ID SMS code"].

SMS authentication issue: not receiving SMS code

	
The signal/reception is not good

SMS uses networks provided by mobile companies. Check the network you are using.
	
Using Wi-Fi

When you are using Wi-Fi (Wireless LAN), you may not be able to receive SMS message. Check the Wi-Fi setting.
	
Blocking incoming SMS

The service to block unsolicited messages provided by the mobile companies may be the cause. Check the settings.
	
The contracted plan / your device does not allow SMS

Depending on the contracted plan or the device (especially feature phone), SMS

may not be used. Use voice guidance authentication instead.
	
Signing up outside of Japan

SMS code can't be sent overseas. Use voice guidance authentication instead.

If you still have a problem with phone number authentication


Our English support staff will help you. Please contact us.