I got an email from YahooJP saying that I need to register a phone number that I can use in case I forgot my password and they will send the authentication code to that registered mobile number. (By the way, I am using my YahooJP ID for ebookjapan purchases - I have lots of manga there so I really don’t want to lose my account.) Since I don’t live in Japan, it’s impossible to get a Japanese phone number. For now, I just chose the option of receiving the authentication code using my other emails, but I am just worried that they might just require a phone number in every transaction. Has anyone with YahooJP account (living outside Japan) received this email as well? What did you do with the SMS authentication requirement?