It appears that following the murder of Komiyama, three people stepped forward as the murderer. However, which one of the three is the actual murderer? Katsumata Kengo, Niikura Yumiko, and Hoshino Hariyuki all had a motive, and when questioned by the police, all three admitted to the murder.
Katsumata Kengo struck him over the head with a vase after being angered by the man and moved his body into the utility closet. However, Hoshino Haruyuki likewise admitted to murdering the man after being told that Yumiko would never be his by Komiyama and then hit him over the head with... a vase. While at school, Niikura Yumiko admits that Komiyama made a pass at her and came after her at the school and getting frightened, struck him over the head... with a vase.
So who is the actual killer?!? It's up to Conan to help Mouri Kogorou and the police solve the case of the four times killed man.
Spoilers ahead for viewers who have watched the Detective Conan Season 34 finale. After 34 seasons and 1,297 episodes, it would be easy to assume that Gosho Aoyama’s legendary mystery anime has nothing left to prove. And yet the Season 34 finale, which aired on September 5, 2026, is another reminder of why Detective Conan remains one of Japan’s most enduring crime, suspense, comedy, adventure, and mystery series. The finale does not reinvent the formula; instead, it sharpens the pleasures that have kept fans following Conan Edogawa for decades: a clever case, emotional restraint, character history, and the constant sense that the truth is always one deduction away.
Season 34 opened with a telling choice: before he became Conan, Shinichi Kudo and Ran Mori’s trip to the aquarium was interrupted by murder. That first episode immediately brought the season back to the original wound of the series: Shinichi is still a teenager trapped in a child’s body after being poisoned by a sinister organization, and every case he solves as Conan carries the weight of a life he is unable to fully reclaim. The finale works because it understands that Detective Conan is not only about identifying culprits. It is about the tragedy of a brilliant detective forced to live beside the people he loves while hiding the most important truth of all.
What worked best in the Season 34 finale was its confidence. Detective Conan finales often have to satisfy two audiences at once: viewers who come for the weekly mystery structure and long-term fans invested in the bigger mythology surrounding the Black Organization, Ai Haibara, Shinichi’s condition, and Ran’s slow emotional reckoning. This finale balanced those expectations by treating the case as both a puzzle and a character test. The deductions mattered, but the silences mattered too. Conan’s small hesitations, Ran’s sensitivity, and the lingering presence of Shinichi in every decision gave the episode a bittersweet emotional charge.