Oh! Production

Oh! Production is a Japanese support studio established in 1970. Since establishment, they've worked on Hundreds of Anime, usually with In-Betweens.

Complete credits can be found here, here, here and here.

Oh! Productions' credits include:

 * Anpanman (In-Between Animation)
 * Batman Gotham Knight (In-Between Animation)
 * Bleach (Animation; In-Between Animation)
 * Castle in The Sky (In-Between Animation)
 * Canaan (In-Between Animation)
 * Can Can Bunny (Animation)
 * Casshern Sins (In-Between Animation)
 * Code Geass (In-Between Animation; R2 season)
 * Dead Leaves (In-Between Animation)
 * Doraemon (assistance and In-Between Animation for numerous movies)
 * Elemental Gelade (Key Animation)
 * Ergo Proxy (2nd Key Animation)
 * Fushigi Yugi (In-Between Animation)
 * Fullmetal Alchemist (In-Between Animation)
 * Fullmetal Alchemist: Brotherhood (In-Between Animation)
 * Gintama (In-Between Animation)
 * Halo Legends (In-Between Animation)
 * Hanasaku Iroha (In-Between Animation)
 * Inspector Gadget (Additional animation for season one)
 * Kiki's Delivery Service (supporting Animation)
 * Lupin III (Key and In-Between Animation for numerous specials and first & third TV series)
 * Macross Frontier (2nd Key Animation)
 * Mobile Suit Gundam 00 (In-Between Animation)
 * Moetan (Key Animation)
 * Nausicaa of the Valley of the Wind (Supporting Animation)
 * Neon Genesis Evangelion (In-Between Animation)
 * Noir (In-Between Animation)
 * Professor Layton and The Eternal Diva (In-Between Animation)
 * Puella Magi Madoka Magica (2nd Key and In-Between Animation)
 * Ranma One Half (Finish Animation)
 * Shaman King (In-Between Animation)
 * Shin Chan (In-Between Animation, series and various movies)
 * The Sky Crawlers (In-Between Animation)
 * Spirited Away (Supporting Animation)
 * Sword of the Stranger (In-Between Animation)
 * Tama and Friends (Animation for Group TAC)
 * Tiger and Bunny (In-Between Animation)