Kei Masaki Filmography
| 2024 | My Oni Girl · as Second Unit Director |
| 2024 | My Oni Girl · as Key Animation |
| 2022 | Chainsaw Man (TV Series) · as Key Animation |
| 2022 | Drifting Home · as Second Unit Director |
| 2022 | Drifting Home · as Key Animation |
| 2020 | POKÉTOON (TV Series) · as Key Animation |
| 2018 | Penguin Highway · as Key Animation |
| 2018 | Batman Ninja · as Animation |
| 2017 | MFKZ · as Key Animation |
| 2017 | Fastening Days (TV Series) · as Key Animation |
| 2015 | Taifuu no Noruda · as Key Animation |
| 2014 | Your Lie in April (TV Series) · as Key Animation |
| 2014 | Ping Pong The Animation (TV Series) · as Key Animation |
| 2014 | Wonder Momo (TV Series) · as Opening/ending Animation |
| 2012 | Sword Art Online (TV Series) · as Key Animation |