Yeah, I have no idea either.
I can tell you that if you happen to be near the a television studios at the Shimbashi area, this is one of the things you'll see. Have your picture taken with her/him/whatever.
You're invited to play some games as well, but you need to speak Japanese.
Twentieth Century Boys, have your picture taken here! They were promoting the film here. Last year they were promoting a 3-D movie.
For everyone who has ever wondered what a Shamisen (Sanshin for my Okinawan friends) sounds like when played with a baby doll.