Ken Arai Filmography
| 2022 | Don't Call it Mystery (TV Series) |
| 2018 | Kiss that Kills (TV Series) |
| 2014 | Parasyte -the maxim- (TV Series) |
| 2014 | Heartbroken Chocolatier (TV Series) |
| 2014 |
| 2024 | Secret Makeover (TV Series) · as Original Music Composer |
| 2023 | Don't Call it Mystery: The Movie · as Original Music Composer |
| 2023 | Opus Colors (TV Series) · as Original Music Composer |
| 2019 | Trace (TV Series) · as Composer |
| 2018 | Switched (TV Series) · as Original Music Composer |
| 2018 | Kiss that Kills: Parallel (TV Series) · as Original Music Composer |
| 2017 | Pingu in the City (TV Series) · as Original Music Composer |
| 2015 | High School Star Musical (TV Series) · as Original Music Composer |
| 2013 | The Last Hope (TV Series) · as Composer |
| 2012 | The Locked Room Murders (TV Series) · as Composer |