Group ZEN is a minor support Japanese studio. Like many of its ilk, there's little to no information beyond some credits. Most of which can be found here
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Credits include:
- Armor Hunter Mellowlink (Key & In-Between Animation)
- Astro Boy (Key Animation, 2003 series)
- The Brave Express Might Gaine (Key Animationnote )
- The Brave Fighter of Legend Da-Garn (Key & In-Between Animation)
- Bubblegum Crash (Animation Assistance)
- Captain Tsubasa J (Animation)
- Chousoku Henkei Gyrozetter (Key Animation, first opening animation)
- Dirty Pair Flash (Key Animation and the Opening/ending Animations for Mission Two)
- El-Hazard: The Magnificent World (Opening Animation)
- Fatal Fury - Legend of The Hungry Wolf (Key Animation)
- The Five Star Stories (Animation Cooperation)
- Future GPX Cyber Formula Zero (Key Animation)
- Several Golden Films animations (Layouts only. Done with KK C&D Asia, Mook DLE, Philippine Animation Studio Inc. and others)
- Jetlag Productions DTVs (Layouts)
- Alice in Wonderland
- Cinderella
- Happy the Littlest Bunny
- Heidi
- Hunchback of Notre Dame, The
- Jungle Book
- Leo the Lion: King of the Jungle
- Magic Gift of the Snowman
- Jewelpet (Key Animation, Sunshine; 2nd Key Animation, Happiness)
- Kiss Him, Not Me (Production Cooperation with Studio Comet for Brains Base)
- Mitsudomoe (Key Animation)
- Nerima Daikon Brothers (Animation)
- Ranma ½ (Key Animation)
- Record of Lodoss War (In-Between Animation)
- Ronin Warriors (Key Animation)
- School Rumble (In-Between Animation for the first series and Extra Semester OVA)
- Sgt. Frog (Key Animation)
- Street Fighter II: The Animated Movie (Key Animation)
- Tenchi Muyo! GXP (Key Animation)
