Established by former Toei Animation animator Yoshio Mukainakano in 1982. Studio Zaendou (スタジオ座円洞) is a Japanese support studio located in Tokyo, with a unit in Sapporo, Hokkaido (established 1993; closed down in 2010).
In 2016, the studio shut down (as announced on their site) and much of its staff went on to form MK-ZA (エムケイ座).
For more credits, check out their page on Anime News Network
- Astro Boy (Animation; 2003 series)
- Celestial Method (In-Between Animation)
- Chousoku Henkei Gyrozetter (Key, Finish & In-Between Animation; Animation Direction)
- Detective Conan (In-Between Animation)
- Digimon Adventure tri. (Key & In-Between Animation; Animation Direction)
- Gundam Build Fighters (In-Between Animation)
- Melty Lancer: The 3rd Planet (Animation Production with Gonzo)
- Ōban Star-Racers (Key & In-Between Animation; Digital Paint)
- Oreimo (Production Cooperation, second series)
- Puella Magi Madoka Magica (Animation Assistance)
- Those Who Hunt Elves (Key & In-Between Animation; season 2)
- Tokyo Ghoul √A (Animation Direction)