Okay, so what's up with the confusion about her birth date?
VGMdb: March 19, 1964
JP Wiki: May 19, 1967
EN Wiki: March 19, 1967
ANN: May 19, 1964
IMdb: March 19, 1964
AniDB: March 18, 1964
Anison: May 19, 1967
The only one that has a source is JP Wiki which cites a
4gamer article from 2007.
Edit: I am switching to the cited date for now. Though this should probably be looked into.
Edit2: I've dug into this thing a bit more. So the March 18, 1964 date that we had here before originally came from JP wiki. It's only somewhat recently that it was changed to May 19, 1967. First, I found that her birth date is, in fact, March 18th, despite most sites listing the 19th. This bit of info comes from the
official website of TETSU100%, a band which Kanno has been a part of for over a decade. The site doesn't list her birth year but does have info that you can't find elsewhere like her blood type and picture of her signature. The real issue here is her birth year which I could not find a definitive source for. I have left it blank. Feel free to research it if you like.