Okay, I said I'd do something, so here it is. If sourced the info from this thread and 
my own work on anime-related production.
From what I can tell, either some filters have already been added or a lot of this bad information has not come across from the 2.x database (from which much of the prior work was based). Because of this, I've split this list in two; one for the still active list entries, and the second for those I can not find in v3.x but existed in 2.x.
Studios in 3.x:2 entertain Video      ->     2 Entertain 
20th Century Fox Home Ent      ->     20th Century Fox Home Entertainment 
A.D. Vision      ->     ADV Films 
A.P.P.P. Co., Ltd.      ->     A.P.P.P. 
Animeigo      ->     AnimEigo 
Aniplex Inc.      ->     Aniplex 
BBC Worldwide Ltd.      ->     BBC Worldwide 
Central Park Media Corporation      ->     Central Park Media 
Daiei Co., Ltd.      ->     Daiei Studios 
Disney Enterprises, Inc.     ->     Disney Enterprises 
Fuji-TV      ->     Fuji TV 
FUNimation Productions      ->     FUNimation 
Geneon      ->     Geneon Entertainment (USA) 
GoFish      ->     Go Fish Pictures
Golden Harvest Company      ->     Golden Harvest 
Gonzo Digimation      ->     Gonzo 
Japan Victor Company      ->     JVC 
JC Staff      ->     J.C. Staff 
Kadakawa Shoten      ->     Kadokawa Shoten 
Kitty Films      ->     Kitty Film 
Mad House      ->     Madhouse 
Manga      ->     Manga Entertainment 
Manga Video      ->     Manga Entertainment 
Media Asia      ->     Media Asia Distribution 
Media Asia Distribution Ltd.      ->     Media Asia Distribution 
Miramax      ->     Miramax Films 
Optimum Asia      ->     Optimum Releasing 
Optimum Entertainment      ->     Optimum Releasing 
Optimum Home Entertainment      ->     Optimum Releasing 
Phoenix      ->     Phoenix Animation 
Pioneer Animation      ->     Pioneer Entertainment (USA) 
Pioneer Entertainment (USA) Inc.      ->     Pioneer Entertainment (USA) 
Polygram Filmed Entertain      ->     PolyGram Filmed Entertainment 
Sega Enterprices      ->     Sega Enterprises 
Shonen Gahosha      ->     ShonenGahosha 
Shonengahosha      ->     ShonenGahosha 
Tatsunoko Productions      ->     Tatsunoko Production 
TBS Animation      ->     TBS 
TMS      ->     TMS Entertainment 
TMS Entertainment Ltd.      ->     TMS Entertainment 
Toei Company     ->     Toei Animation 
Toei Company, Ltd.     ->     Toei Animation 
Toei Video      ->     Toei Animation 
Toho Co.      ->     Toho 
Toho Co., Ltd      ->     Toho 
Toho Company Limited      ->     Toho 
Toho International     ->     Toho 
Tokyo TV      ->     TV Tokyo 
Studios in 2.x:A.D.V. Films      ->     ADV Films 
A.I.C., Inc.      ->     AIC 
AD Vision      ->     ADV Films 
Anchor Bay      ->     Anchor Bay Entertainment 
Anchor Bay (UK)      ->     Anchor Bay Entertainment UK
Anchor Bay UK      ->     Anchor Bay Entertainment UK
Anime Works      ->     AnimeWorks 
AnimEigo, Inc.      ->     AnimEigo 
AnimEigo/M2K      ->     AnimEigo 
Bandai      ->     Bandai Entertainment 
Bandai Home Video      ->     Bandai Entertainment 
Bandai Visual Co Ltd.      ->     Bandai Visual 
Bandai Visual Co Ltd.:      ->     Bandai Visual 
Bandai/Emotion      ->     Bandai Visual 
Bang Zoom!      ->     Bang Zoom! Entertainment 
BBC Worldwide Ltd      ->     BBC Worldwide 
Buena Vista      ->     Buena Vista Home Entertainment
Buena Vista H. E.     ->     Buena Vista Home Entertainment
Dimension Home Entertainment     ->     Dimension Films 
Dimension Home Video     ->     Dimension Films 
Dreamworks     ->     DreamWorks Pictures 
DreamWorks     ->     DreamWorks Pictures 
Dreamworks H. E.     ->     DreamWorks Home Entertainment
Dreamworks Home Ent.     ->     DreamWorks Home Entertainment
Dreamworks Pictures     ->     DreamWorks Pictures 
Film Four      ->     FilmFour 
Geneon Entertainment (USA) Inc.      ->     Geneon Entertainment (USA) 
Geneon/Pioneer      ->     Geneon Entertainment (USA) 
Hand Made Films      ->     HandMade Films
Handmade Films      ->     HandMade Films
Handmade Films Ltd      ->     HandMade Films
Handmade Films Ltd.     ->     HandMade Films
Harmony Gold U.S.A. Inc.      ->     Harmony Gold 
Hollywood      ->     Hollywood Pictures
Hollywood Pictures Home Entertainment     ->     Hollywood Pictures
Kodansha Ltd.      ->     Kodansha 
Manga Film      ->     Manga Entertainment 
Miramax Home Entertainment     ->     Miramax Films 
Miramax Home Video     ->     Miramax Films 
Pioneer Laser      ->     Pioneer LDC 
Pioneer LDCA Karaoke      ->     Pioneer LDC 
Sony Music Entertainment      ->     SME Visual Works 
Sony Pictures Entertainment      ->     SPE Visual Works 
Star Child      ->     Starchild 
Studio 4C      ->     Studio 4°C 
TOEI ANIMATION CO. LTD.      ->     Toei Animation 
Tokuma Japan Communicatio      ->     Tokuma Shoten 
Tokyo Broadcasting System      ->     TBS 
Touchstone     ->     Touchstone Pictures
Touchstone Home Entertainment     ->     Touchstone Pictures
Touchstone Home Video     ->     Touchstone Pictures
Tristar      ->     TriStar Pictures 
Tristar Pictures     ->     TriStar Pictures 
Victor Entertainment      ->     JVC 
Warner Bros. Entertainment     ->     Warner Bros.
I'm not claiming infallibility, so speak up if you think I've made any mistakes.
Also, I would suggest removing all of the following suffixes from studios upon submission (for any combination of cases - e.g. "co" vs "Co") and running again if it fails once to ensure that all of the irrelevant suffixes are fully removed:
[Space]
.
,
Co
Ltd
Inc
Company
Limited
E.g. "Toho Co., Ltd" would fail this check six times before finally passing with "Toho". The fails would be (in sequence):
- Ltd
- [Space]
- ,
- .
- Co
- [Space]
I hope this is of some actual benefit - it's alway nice to help. 
 Stuart