>>7
Well, you also have studios that were started by people who split off from large studios like Sunrise and MushiPro.
Some people like Ikuhara and Hosoda probably left Toei because they were not allowed to work on anything else other than the brands that Yamakan mentioned like Sailor Moon or Digimon and One Piece.
How did the production committee start anyway? Most fans have that misconception that studios fund and benefit the most from their works when that isn't usually the case. I mean even looking at Kyoani's commercials, it's clear these guys want to do something different but they're still hampered by what I can only guess as a lack funding on their side so they have to meet the investors and producers demands.
Makes you wonder how Yuasa gets all of his stuff green-lighted though.