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.
| Production | Michihiko Suwa | Producer |
| Directing | Daisuke Nishio | Director |
| Editing | Masaaki Hanai | Editor |
| Writing | Takuya Nishioka | Screenplay |
| Sound | Tadao Takakuwa | Music Producer |
| Sound | Kenji Ninomiya | Sound Recordist |
| Visual Effects | Michi Himeno | Animation Director |
| Visual Effects | Michi Himeno | Character Designer |
| Sound | Kaoru Wada | Original Music Composer |
| Visual Effects | Shingo Araki | Animation Director |
| Art | Junichi Taniguchi | Art Direction |
| Camera | Masatoshi Fukui | Director of Photography |
| Sound | Yasuyuki Konno | Sound Effects |
| Visual Effects | Shingo Araki | Character Designer |
| Editing | Shinichi Fukumitsu | Editor |
| Sound | Naomi Machida | Music Producer |
