Invited for a anniversary celebration, Kindaichi, Miyuki and inspector Kenmochi re-visit the Opera House. There they discover that a play of The Phantom of the Opera is being rehearsed again. However, it doesn't take long when members of the acting troupe are killed by the Phantom. Kindaichi will once again have to solve a murder series in the Opera House.
Unfortunately the movie Kindaichi Case Files Movie 1: The Opera House Murders is not yet available on HBO Max.
| Directing | Daisuke Nishio | Director |
| Production | Michihiko Suwa | Producer |
| Sound | Kaoru Wada | Original Music Composer |
| Sound | Yasuyuki Konno | Sound Effects |
| Visual Effects | Shingo Araki | Animation Director |
| Visual Effects | Shingo Araki | Character Designer |
| Writing | Takuya Nishioka | Screenplay |
| Camera | Masatoshi Fukui | Director of Photography |
| Art | Junichi Taniguchi | Art Direction |
| Sound | Tadao Takakuwa | Music Producer |
| Editing | Shinichi Fukumitsu | Editor |
| Visual Effects | Michi Himeno | Character Designer |
| Visual Effects | Michi Himeno | Animation Director |
| Editing | Masaaki Hanai | Editor |
| Sound | Naomi Machida | Music Producer |
| Sound | Kenji Ninomiya | Sound Recordist |
| Sound | Yuuko Tsuburaya | Theme Song Performance |
| Writing | Shin Kibayashi | Author |
