Behind the camera
- 2026Draw This, Then Die!Key Animation2 ep.
- 2025Solo Camping for TwoKey Animation3 ep.
- 2024Negative Positive AnglerKey Animation1 ep.
- 2024Sakuna: Of Rice and RuinKey Animation1 ep.
- 2024A Condition Called LoveKey Animation1 ep.
- 2023MF GHOSTKey Animation1 ep.
- 2023A Galaxy Next DoorKey Animation1 ep.
- 2023Reborn to Master the Blade: From Hero-King to Extraordinary Squire ♀Key Animation1 ep.
- 2022Shinobi no IttokiKey Animation1 ep.
- 2022Aharen-san wa HakarenaiKey Animation3 ep.
- 2022The Heike StoryKey Animation1 ep.
- 2022Tokyo 24th WardKey Animation1 ep.
- 2021PuraOre! ~Pride of Orange~Key Animation1 ep.
- 2021Vivy -Fluorite Eye's Song-Key Animation1 ep.
- 2021SHAMAN KINGKey Animation1 ep.
- 2021Cells at Work! CODE BLACKKey Animation1 ep.
- 2020Iwa Kakeru! Sport Climbing GirlsKey Animation1 ep.
- 2020Great PretenderKey Animation1 ep.
- 2018Puzzle & DragonsKey Animation5 ep.
- 201691 DaysKey Animation1 ep.
- 2016Divine GateKey Animation2 ep.
- 2014Tokyo GhoulKey Animation5 ep.
- 2012KingdomKey Animation3 ep.
- 2010Star DriverKey Animation1 ep.
- 2010Cobra the AnimationKey Animation3 ep.
- 2007BokuranoKey Animation1 ep.
- 2005Gaiking: Legend of Daiku-MaryuKey Animation1 ep.
- 2005Solty ReiKey Animation1 ep.
- 2002Duel MastersKey Animation1 ep.
- 2000Yu-Gi-Oh! Duel MonstersKey Animation3 ep.
- 2000Boogiepop PhantomKey Animation1 ep.
- 1994New Cutey HoneyKey Animation1 ep.
- 1992Bastard!!Key Animation1 ep.
Also known as: Kazuo Ohhara · Kazuo Ôhara · Kazuo Oohara · 大原 和男 · 大原かずお · 大原和夫