What I mean by this is not the alias they use when they do H-Games. What I mean is whether they use a stage-name when doing anime works.
It all started from a little question I had in mind, "Is Hanazawa Kana really Hanazawa Kana?" Usually people in the entertainment industry use a stage-name to avoid mixing up their personal life and their public life. An example for this is the actor Hiro Mizushima, who is not really Hiro Mizushima by birth. His birth name is Saito Tomohiro. Does the same hold true with the seiyuu profession?
I also noted that Mizuki Nana's birth name is Kondo Nana. But is she just a rare case or are most seiyuu like that (that is, using a stage name)?