I theorized a while back that this Masahiro Aoki at Capcom was also somewhat prominent doujin artist
Godspeed (
see this thread for more), and it seemed kind of solid at the time, but at the back of my mind I've always been a little unsure.
Well, Masahiro Aoki joined GeOnDan. Here's his profile:
http://s1.shard.jp/geondan/masahiroaoki.html. "BORN in 22/OCT/1984 OSAKA"
Here's Godspeed's profile:
http://www.vivix.info/about.htm. Also born in Osaka on October 22, 1984.
Furthermore:
GeOnDan's list of members' Twitter accounts contains Godspeed's account, Godspeed_ViViX.
Just in case anyone besides myself had lingering doubts.