Yes.
http://animelo.jp/challenge/
This time it's held in Saitama Super Arena; depending on the stage setting, it can fit up to 37,000 fanboys/girls.
They divide it into 2 days with different artists:
8.30 (Sat): ALI Project, GRANRODEO, Kuribayashi Minami, Chihara Minori, Mizuki Nana
8.31 (Sun): Ishikawa Chiaki, JAM Project, angela, Hirano Aya, Momoi Halko
...gosh what a list. I'd kill for a ticket.