Playback is currently unavailable for S1 E1 · The Case of the Metropolitan Serial Drownings. Episode details remain available below.
Ron Kamonohashi's Forbidden Deductions
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!
- Cast:
- Yohei Azakami, Junya Enoki, Yoko Hikasa, Taku Yashiro
- Language:
- Japanese
- Country:
- Japan
- Network:
- AT-X, TOKYO MX
Episode guide
Seasons
Season 1
Episodes
E01
Episode 1
★ 6.0The Case of the Metropolitan Serial Drownings
2023-10-02 · 25mThe Metropolitan Police Department is struggling to investigate a series of murders, yet Detective Isshiki is ordered to go home. Kiku of the General Affairs Division sends him to meet a certain sleuth—a shaggy-haired eccentric named Kamonohashi Ron.
Current episode
E02
Episode 2
★ 4.0The Case of the Locked-Room Piggy Bank Theft
2023-10-09 · 24mRon is excited to solve cases by using Toto, but he's not on any good ones because his boss thinks he's useless. All he gets are odd jobs and busywork. Ron, however, is quite interested in a new report about coins going missing from a piggy bank...
Watch progress · Not tracked
E03
Episode 3
The Case of the Benizome Hot Spring Murder (1)
2023-10-16 · 24mRon wins a pair of tickets to a hot spring in a raffle. Toto accompanies him to stay at the Benizome Inn. The innkeeper who greets them is friendly, but he isn't who he seems. Plus, it isn't long before Ron's eccentricities begin to surface.
Watch progress · Not tracked
E04
Episode 4
The Case of the Benizome Hot Spring Murder (2)
2023-10-23 · 24mThere has been a murder. Ron listens to the other guests' testimonies and begins his deductions. Spitz secretly rejoices at this chance to catch Ron in the act of sleuthing, but outwardly both he and Amamiya entrust the investigation to Toto.
Watch progress · Not tracked
E05
Episode 5
The Case of the Hand Collector
2023-10-30 · 24mKawasemi Omito, a supremely skilled detective, leads a joint investigation into a serial killing case. Amamiya lends him Toto, whom Kawasemi deems so useless he's invisible. Ron appears at the newest crime scene as a consultant, irritating Kawasemi.
Watch progress · Not tracked
E06
Episode 6
The Case of the Live Broadcast Murder
2023-11-06 · 24mRon loves a certain TV show that puts psychic abilities to the test. During a live broadcast, a psychic claims he can control minds with written words. His neurosurgeon opponent refutes his claims. Then, the psychic writes the word "Death" on a card.
Watch progress · Not tracked
E07
Episode 7
The Case of the Observatory Murder (1)
2023-11-13 · 24mToto and Ron are invited to a meteor shower viewing being held on Nandan Island. Also invited is John Grizzly, an instructor at BLUE. There was a murder at the observatory years ago, so the director has brought in first-rate detectives...just in case.
Watch progress · Not tracked
E08
Episode 8
The Case of the Observatory Murder (2)
2023-11-20 · 24mRon is named main suspect in a murder and Toto investigates to clear his name. Everyone but Ron has an alibi for the time of the murder, which only seems to cement his guilt, but Toto discovers a few things that cast a new light on the incident.
Watch progress · Not tracked
E09
Episode 9
The Case of the Observatory Murder (3)
2023-11-27 · 24mToto gathers everyone together and explains the truth behind the murders. With their name exposed, the culprit takes drastic measures not to be caught, but not before revealing that there's more to this incident than anyone imagined.
Watch progress · Not tracked
E10
Episode 10
The Case of the Poisoned Latte
2023-12-04 · 24mToto is shadowed by a reporter who's a huge fan of his for the way he's solved one difficult case after another. They step into a cafe where Ron happens to be working, making things a little awkward. Then, a customer collapses to the ground—poisoned!
Watch progress · Not tracked
E11
Episode 11
The Case of the Mad Chameleon Murder
2023-12-11 · 24mToto meets Kawasemi while on a business trip to Aichi. Kawasemi's been in a slump since losing Yamane, and his powers of perception have suffered. He's investigating the Mad Chameleon, who commits a crime right in front of them!
Watch progress · Not tracked
E12
Episode 12
The Case of the Yadagami-sama Murders (1)
2023-12-18 · 24mRon agrees to take on Spitz's search request in exchange for his obtaining a file on the Bloody Training Incident. Spitz accepts Ron's terms and takes Ron and Toto to Yadamura, a village in Yamanashi prefecture where his ethnologist brother disappeared.
Watch progress · Not tracked
E13
Episode 13
The Case of the Yadagami-sama Murders (2)
2023-12-25 · 24mToto reveals the truth of the case and the culprit admits to their crimes. Ron's disorder triggers, putting the culprit in danger, but help comes from an unexpected source. Who is their last minute savior, and how are they connected to everything?
Watch progress · Not tracked
E14
Episode 14
The Case of the Shibuya Apocalypse Serial Murders (1)
2024-10-07 · 24mThere's been a murder in Shibuya. A man has been found killed in a ghastly and impossible manner. Toto and Amamiya arrive at the scene to find Ron already there. A mysterious message makes them wonder if there's more to the crime than meets the eye.
Watch progress · Not tracked
E15
Episode 15
The Case of the Shibuya Apocalypse Serial Murders (2)
2024-10-14 · 24mThere's been another murder in Shibuya. Shocked by the death, the victim's teammate runs. Ron and Toto race to catch him and find more information on the culprit picking off the hacker team. But the more they find, the more complicated things become.
Watch progress · Not tracked
E16
Episode 16
The Case of the Shibuya Apocalypse Serial Murders (3)
2024-10-21 · 24mA huge monitor across the street explodes. While Ron and Toto try to make sense of events, Winter tells them that they've lost more than they realize. As Winter torments Ron with the guilt of his failure, Ron realizes that Winter is hiding something.
Watch progress · Not tracked
E17
Episode 17
The Case of the Midsummer Beachside Stand Drowning (1)
2024-10-28 · 24mToto suggests that Ron take a rest. They invite Ron's doctor, Usaki Mofu, along and head for a dip in the ocean. Ron looks forward to having shaved ice with black sugar syrup from a beachside stand, but things soon take a tragic turn.
Watch progress · Not tracked
E18
Episode 18
The Case of the Midsummer Beachside Stand Drowning (2)
2024-11-04 · 24mRon and the others interview witnesses, but everyone has an alibi for the surfer's estimated time of death. They can't find any concrete evidence that indicates who committed the murder. Then Mofu's usual clumsiness leads to an unexpected clue.
Watch progress · Not tracked
E19
Episode 19
The Case of the Genius Composer Abduction (1)
2024-11-11 · 24mRon accompanies Toto to the concert of a super popular artist Nyonyon. After the performance, a card is found in her room. It's from the Talent Abductor, Hummingbird, who has been taking geniuses of all types one after another.
Watch progress · Not tracked
E20
Episode 20
The Case of the Genius Composer Abduction (2)
2024-11-18 · 24mNyonyon has disappeared. No matter how much they search the house, there's no sign of her. Sannou presents his personal deductions and concludes that Hummingbird is actually there among them, but Ron spots a hole in his reasoning.
Watch progress · Not tracked
E21
Episode 21
The Case of the Psychology Research Lab Murder (1)
2024-11-25 · 24mA lack of cases has left Ron bored, so he and Toto go with Chikori to gather information for a story she's working on. They visit a university lab researching cognitive psychology where the air is filled with hostility.
Watch progress · Not tracked
E22
Episode 22
The Case of the Psychology Research Lab Murder (2)
2024-12-02 · 24mRon and Toto present their deductions to Professor Aoe and the students who use the lab. A number of inconsistencies, starting with the postmark on the threatening letter, lead to the killer's identity and the selfish reasons for their crime.
Watch progress · Not tracked
E23
Episode 23
The Case of the Highland Auberge Serial Murders (1)
2024-12-09 · 24mRon and a number of other guests have been invited to Reunion, an auberge located on a verdant plateau. When their multi-course dinner is served, Ron notices that most everyone seems uneasy. The next morning, there's a disturbing discovery.
Watch progress · Not tracked
E24
Episode 24
The Case of the Highland Auberge Serial Murders (2)
2024-12-16 · 24mA second victim is found. Ron notices a pattern in the murder scenes and decides that the key to the mystery must lie there. It soon becomes clear that the guests who were upset by the food the night before are all connected to a case from the past.
Watch progress · Not tracked
E25
Episode 25
The Case of the Highland Auberge Serial Murders (3)
2024-12-23 · 24mRon is in a state of shock after a staggering revelation. He shows no reaction when a third murder occurs. Toto investigates, dragging Ron with him. When Ron recovers enough to help with the case, he tells Toto what he's decided to do.
Watch progress · Not tracked
E26
Episode 26
The Case of the Highland Auberge Serial Murders (4)
2024-12-30 · 24mThe culprit behind the killings at the auberge has been identified, but Ron is still reeling from the flood of memories that this case has triggered. Will the missing pieces of his past bring him despair, or something else?
Watch progress · Not trackedCast
Yohei Azakami
Ron Kamonohashi (voice)
Junya Enoki
Totomaru Ishiki (voice)
Yoko Hikasa
Amamiya (voice)
Taku Yashiro
Spitz Feier (voice)