2 on Avex, but she switched labels from Toshiba-EMI at the end of 2005. 5 singles, 2 albums + a best of album, 2 PV collection DVDs, an IV DVD, and a photobook while on Toshiba-EMI. They're all in that that picture I posted
http://img168.imageshack.us/img168/589/sspx0341om3.jpg along with the 2 on Avex. Except her first album, which I see I forgot to grab when I took the picture ^^;
Top row is first Avex single, first PV collection, last Toshiba-EMI single.
Second row is second Avex single, second album, first Toshiba-EMI single (as Nacchan instead of under the Hoshii Nanase name)
Third row is fourth, third, and second Toshiba-EMI singles.
Fourth row is best album, second PV collection, IV DVD.
And then PB at the bottom.
Oh, and 2003/06/18 was the release date on her first single, so she's been around for ~3.5 years now. Not that new.