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Ron Kamonohashi was once regarded as a genius at the top detective training academy. But after a fatal mistake, he was expelled and forbidden to become a detective. Years later, police officer Totomaru Isshiki knocks on Ron’s door seeking help on a serial murder case. He finds Ron, now a messy-haired recluse, who agrees. Together, this mismatched detective team begins solving their first mystery!

Series Cast

  1. Yohei Azakami as Ron Kamonohashi (voice)

    Yohei Azakami

    Ron Kamonohashi (voice)

    13 Episodes

  2. Junya Enoki as Totomaru Ishiki (voice)

    Junya Enoki

    Totomaru Ishiki (voice)

    13 Episodes

  3. Yoko Hikasa as Amamiya (voice)

    Yoko Hikasa

    Amamiya (voice)

    13 Episodes

  4. Taku Yashiro as Spitz Feier (voice)

    Taku Yashiro

    Spitz Feier (voice)

    13 Episodes

  5. Kazuhiro Yamaji as John Grizzly (voice)

    Kazuhiro Yamaji

    John Grizzly (voice)

    4 Episodes

  6. Kikuko Inoue as Aimee Emmerich (voice)

    Kikuko Inoue

    Aimee Emmerich (voice)

    3 Episodes

  7. Nao Toyama as Mofu Usaki (voice)

    Nao Toyama

    Mofu Usaki (voice)

    2 Episodes

  8. Jun Fukuyama as Omito Kawasemi (voice)

    Jun Fukuyama

    Omito Kawasemi (voice)

    2 Episodes

  9. Akira Sekine as Mii (voice)

    Akira Sekine

    Mii (voice)

    2 Episodes

  10. View More

Full Cast & Crew

Current Season

Season 1

2023 • 13 Episodes

Ron Kamonohashi, the best student in the history of the elite Detective Training Academy BLUE, has been living as a recluse since BLUE expelled him five years ago. His situation changes drastically when police detective Totomaru Isshiki, following the advice of a senior colleague, seeks him out for help with a criminal case that has remained unsolved for months. Ron reluctantly agrees to help Totomaru and uses his phenomenal intuition to discover the culprit in less than a day. However, it appears that Ron suffers from a mysterious condition that can cause those around him to lose their lives. To Ron's great surprise, Totomaru manages to save the life of someone whom Ron put in jeopardy. As the unlikely duo starts solving crimes one after another, BLUE sends operatives after them. Fighting against various obstacles, Ron and Totomaru must join forces if they want to survive and see justice prevail.

The Case of the Yadagami-sama Murders (2)

(1x13, December 25, 2023) Season Finale

View All Seasons

Ron Kamonohashi's Forbidden Deductions
Ron Kamonohashi's Forbidden Deductions


Original Name 鴨乃橋ロンの禁断推理

Status Returning Series


  • See more TV shows from Tokyo MX...

Type Scripted

Original Language Japanese


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  • Created by credit

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