Ron Kamonohashi: Deranged Detective (
Japanese: 鴨乃橋ロンの禁断推理,
Hepburn: Kamonohashi Ron no Kindan Suiri,
lit.'Ron Kamonohashi's Forbidden Deduction') is a Japanese
manga series written and illustrated by
Akira Amano. It has been serialized in
Shueisha's Shōnen Jump+ since October 2020, with its chapters collected into 14 tankōbon volumes as of June 2024. Shueisha also simultaneously publishes the series in English and Spanish for free on the Manga Plus app and website. An
anime television series adaptation by
Diomedéa aired from October to December 2023. A second season is set to premiere in October 2024.
Premise
The series focuses on the adventures of Ron Kamonohashi, an eccentric
private detective, and Totomaru Isshiki, an unskilled
police officer, as they solve crimes together.[3] Five years ago, Ron was the top student at the Detective Training Academy Blue. However, after being found responsible via temporary insanity for a deadly incident known as the "Bloody Field Trip", his detective license was revoked and he was expelled. Unable to fulfill his only love of solving mysteries, Ron has lived in isolation since. When Totomaru seeks his help on a case, the two form a partnership where Totomaru takes the credit for the cases that Ron solves.
A sixth-generation descendant of
Sherlock Holmes, and a ninth-generation descendant of
James Moriarty. His detective license was revoked five years ago following the "Bloody Field Trip", an incident he cannot remember. Whenever he hears a murderer confess their crime, Ron enters an uncontrollable state where he pressures and convinces them to kill themselves.
A police detective in the Metropolitan Police Department who gains some renown by taking credit for the cases that Ron solves. Ron calls him by the nickname "Toto" (トト).
A renowned
neurosurgeon who is extremely clumsy outside the operating room and is always wearing bandages due to her injuries. She concocts a combination of medicines to suppress Ron's "culprit-killing" syndrome, but there are side effects.
A pedantic detective from the Aichi Prefectural Police. He has the highest number of solved cases in the entire country and is an old colleague of Amamiya.
A crime reporter who often helps Totomaru and Ron with research and information gathering. She greatly admires Totomaru and dislikes Ron.
Elmer Stingray (エルマー・スティングレイ, Erumā Sutingurei)
An American who transferred to Blue Academy three days before the "Bloody Field Trip" and claims to have been Ron's friend, although Ron does not remember him. He is revealed to be an assistant to the Holmes family, specifically to Ron's mother, who views him as an adopted son.
Blue
The Detective Training Academy Blue (探偵養成学校BLUE) in England is the world's most prestigious academy for training detectives.
The tracking instructor at Blue, who is sent to investigate whether Ron is violating his detective ban. However, his actual goal is to have Ron help him find his missing brother. Spitz befriends Ron and Totomaru and continues to assist them on various cases.
The anatomy instructor at Blue. He has been a suspect in 15 murder cases, with one of these instances being the reason he was demoted to A-rank detective.
The principal of Blue and a friend of Ron's parents. She informs Ron of the M Family's involvement in the Bloody Field Trip incident, though discretely due to there being an M Family informant at Blue.
The Moriarty family, more commonly referred to as the "M. Family" (M家), is a legendary
crime syndicate and the archenemy of the Holmes detective family.
The fourth child of the M. Family who specializes in disguises. After failing at a mission, Milo has an assassin shoot Winter, but then has doctors nurse her back to health as she survives the attack. After recovering, Winter splits from Milo, whom she never forgave for killing their younger sister Alice.
The eldest child and current head of the M. Family. He killed his younger sister Alice in order to earn that position. After he loses to Ron, Milo is attacked on the orders of the "new boss" of the family.
Ron Kamonohashi: Deranged Detective, written and illustrated by
Akira Amano, began its bi-weekly serialization in
Shueisha's
online magazineShōnen Jump+ on October 11, 2020.[10][11] The series ended its first part on April 30, 2023, with the second part beginning on June 4.[12] Shueisha has collected its chapters into individual tankōbon volumes. The first volume was released on February 4, 2021.[13] As of June 4, 2024, fourteen volumes have been released.[14]
The series has been licensed for simultaneous publication in North America as it is released in Japan, with its chapters being digitally launched in both English and Spanish by Shueisha on its Manga Plus service.[15][16]
116. "The Case of the Cryptid Serial Murders Pt. 16" (幻想獣連続殺人事件⑯)
117–120. "The Mystery of Maison de Kamonohashi Pts. 1–4" (メゾン・ド・カモノハシの怪事件①–④)
121–124. "The Case of the Kamakura Teahouse Murder Pts. 1–4" (鎌倉茶屋殺人事件①–④)
125. "Target: World Detective Alliance Pt. 1" (狙われる世界探偵連盟①)
Chapters not yet in tankōbon format
These chapters have yet to be published in a tankōbon volume.
126. "Target: World Detective Alliance Pt. 2" (狙われる世界探偵連盟②)
127–135. "The Case of the Ferris Wheel Disappearance Pts. 1–9"
136. "The Case of the Tokyo Chimera Serial Murders Pt. 1"
Anime
An
anime television series adaptation was announced on December 18, 2022. The series is produced by
Diomedéa and directed by Shōta Ihata, with scripts written by
Wataru Watari, character designs handled by Masakazu Ishikawa, and music composed by Yo Tsuji.[29] The series aired from October 2 to December 25, 2023, on
Tokyo MX,
AT-X, and other networks.[6][30] The opening theme song is "Ikenai Fool Logic" (いけない fool logic) by
Unison Square Garden, while the ending theme song is "Lipsync" (リップシンク) by Hockrockb.[31][32]
A second season was announced immediately after the end of the first season.[33][34] It is set to premiere in October 2024.[35]
Crunchyroll licensed the series outside of Asia under the title Ron Kamonohashi's Forbidden Deductions.[36]Medialink licensed the series in South, Southeast Asia, and Oceania (except Australia and New Zealand) and is streaming it on its Ani-One Asia
YouTube channel for its Ultra subscribers.[37]
"The Case of the Benizome Hot Spring Murder (Part 1)" Transliteration: "Benizome Onsen Satsujin Jiken [Zenpen]" (
Japanese: 紅染温泉殺人事件【前編】)
Ageha Kochōran
Sō Sagara
Shōta Ihata
October 16, 2023 (2023-10-16)
4
"The Case of the Benizome Hot Spring Murder (Part 2)" Transliteration: "Benizome Onsen Satsujin Jiken [Kōhen]" (
Japanese: 紅染温泉殺人事件【後編】)
Ageha Kochōran
Sō Sagara
Shōta Ihata
October 23, 2023 (2023-10-23)
5
"The Case of the Hand Collector" Transliteration: "Handokorekutā Satsujin Jiken" (
Japanese: ハンドコレクター殺人事件)
Shingo Tamaki
Jackson Ou
Shingo Tamaki
October 30, 2023 (2023-10-30)
6
"The Case of the Live Broadcast Murder" Transliteration: "Namahōsō Satsujin Jiken" (
Japanese: 生放送殺人事件)
Ageha Kochōran
Sō Sagara
Sorato Shimizu
November 6, 2023 (2023-11-06)
7
"The Case of the Observatory Murder (Part 1)" Transliteration: "Kotō Tenmondai Satsujin Jiken [Zenpen]" (
Japanese: 孤島天文台殺人事件【前編】)
Keizō Kusakawa
Wataru Watari
Keizō Kusakawa
November 13, 2023 (2023-11-13)
8
"The Case of the Observatory Murder (Part 2)" Transliteration: "Kotō Tenmondai Satsujin Jiken [Chūhen]" (
Japanese: 孤島天文台殺人事件【中編】)
Keizō Kusakawa
Wataru Watari
Keizō Kusakawa
November 20, 2023 (2023-11-20)
9
"The Case of the Observatory Murder (Part 3)" Transliteration: "Kotō Tenmondai Satsujin Jiken [Kōhen]" (
Japanese: 孤島天文台殺人事件【後編】)
Keizō Kusakawa, Shingo Tamaki, Ageha Kochōran
Wataru Watari
Keizō Kusakawa
November 27, 2023 (2023-11-27)
10
"The Case of the Poisoned Latte" Transliteration: "Doku-Iri Kaferate Satsujin Jiken" (
Japanese: 毒入りカフェラテ殺人事件)
Shōta Ihata, Keizō Kusakawa, Ageha Kochōran
Sō Sagara
Shōta Ihata
December 4, 2023 (2023-12-04)
11
"The Case of the Mad Chameleon Murder" Transliteration: "Maddokamereon Satsujin Jiken" (
Japanese: マッドカメレオン殺人事件)
Shingo Tamaki
Jackson Ou
Shingo Tamaki
December 11, 2023 (2023-12-11)
12
"The Case of the Yadagami-sama Murders (Part 1)" Transliteration: "Yoru Hebi Kamisama Satsujin Jiken [Zenpen]" (
Japanese: 夜蛇神様殺人事件【前編】)
Shōta Ihata, Shingo Tamaki
Wataru Watari
Sorato Shimizu
December 18, 2023 (2023-12-18)
13
"The Case of the Yadagami-sama Murders (Part 2)" Transliteration: "Yoru Hebi Kamisama Satsujin Jiken [Kōhen]" (
Japanese: 夜蛇神様殺人事件【後編】)
Shōta Ihata
Wataru Watari
Shōta Ihata
December 25, 2023 (2023-12-25)
Reception
In June 2021, Ron Kamonohashi: Deranged Detective was nominated for the seventh
Next Manga Awards in the Best Web Manga category and placed 14th out of 50 nominees.[40][41][42] The series has been recommended by mystery writers
Rintaro Norizuki,
Masaki Tsuji and Sako Aizawa, all of whom have topped the Kono Mystery ga Sugoi! list.[43] In a
blurb, Aizawa called the series an "authentic mystery manga for the new era" and praised its fast pace, as well as the tricks and logic used to identify the culprits.[43]
Notes
^Principal Emmerich's given name has been variously spelled in English as "Eme", "Emme", or "Aimee".
^Originally published as a one-shot in Weekly Shōnen Jump Issue 10 of 2021. First published simply under the series' title, the chapter received a proper title with its tankōbon release.
^
abcInformation is taken from the ending credits of each episode.