[koumori]

I just don't use Facebook for anything interesting. As long as you don't put any secrets on there, you're okay. I use it to keep in contact with family and friends...

...I say again, I'm really surprised Ayu just didn't use a fake name and ask close friends/family not to tag her. I know a few celebrities have admitted using Facebook under a pseudonym just to keep in touch with people. The fact she seems to be okay with people tagging her seems to me like she's okay with people knowing she's around on a private account.

Of course, it could be the case she doesn't use it often and isn't aware that people know.