Studio Ghibli is a longstanding user of Toonz, chosen to produce movies like Princess Mononoke (Mononoke-hime), Spirited Away (Sen to Chihiro no kamikakushi), Howl’s Moving Castle (Hauru no ugoku shiro) and the latest Ponyo on the Cliff (Gake no ue no Ponyo), taking advantages of a computer assisted production without compromising the quality of their work.