Gainax - Catalog of works, writer and artist pages, and technical support. [Japanese and English] - http://www.gainax.co.jp/
Radix/Zero-G Room - Animation workshop, artwork, trailers, and company information. [Japanese and English] - http://www.radixzero.co.jp/
Anime International Company (AIC) - News, productions, trailers, talent profiles and interviews, forum, and company information. [Japanese, English, Korean, and Chinese Traditional] - http://www.aicanime.com/
Tatsunoko Production - Information on the company's works. [Japanese and English] - http://www.tatsunoko.co.jp/
Production I.G - Projects, services, licensing, company information, and columns. [Japanese and English] - http://www.productionig.com/
Studio Pierrot - Information on the company and its productions. [Japanese and English] - http://www.pierrot.co.jp/