Ron Kamonohashi

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. 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found responsible via temporary insanity for a deadly incident known as the "Bloody Field Trip", his detective license was revoked and he was expelled.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. ==Characters==

Main characters ; : : :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 His detective license was revoked five years ago following the "Bloody Field Trip", an incident he cannot remember.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 crime reporter who often helps Totomaru and Ron with research and information gathering. She greatly admires Totomaru and dislikes Ron. ; :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 in England is the world's most prestigious academy for training detectives. ; : :The locked room instructor at Blue and one of less than 10 people in the world who have an S-rank detective license. ; :Fin's bodyguard and a graduate of Blue. He attended the academy at the same time as Ron. He is revealed to be the M. Family's informant at Blue. ; : :Milo's uncle, whose real name is . ; : : :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 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. This is later revealed to be Alice, who survived because she tampered with the gun before Milo shot her. "Disappointed" that Milo showed emotion by hugging her and crying after the shooting, Alice plotted to steal the M. Family away from him once she turned 17. ; :The youngest child of the M. Family. Initially believed to be dead, Alice first appears in the series under the guise of , nicknamed "Billy Goji", a top student at Blue who always has various animals on her. She perpetrates a series of murders at Blue, before escaping custody as her true identity is revealed. World Detective Alliance ; :Director of the Japanese Branch of the World Detective Alliance, an underclassman of Ron at Blue, and the son of Kiku, a police officer and friend of Ron. ==Media==

Manga Ron Kamonohashi: Deranged Detective, written and illustrated by Akira Amano, began its bi-weekly serialization in Shueisha's online magazine Shōnen Jump+ on October 11, 2020. The series ended its first part on April 30, 2023, with the second part beginning on June 4. The second part concluded on July 6, 2025. Shueisha has collected its chapters into individual volumes. The first volume was released on February 4, 2021. Volumes 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. The series aired from October 2 to December 25, 2023, on Tokyo MX, AT-X, and other networks. The opening theme song is by Unison Square Garden, while the ending theme song is by . Following the airing of the final episode, a second season was announced. It aired from October 7 to December 30, 2024. The opening theme song is , by , while the ending theme song is , by Hockrockb. Crunchyroll streamed the series outside of Asia under the title ''Ron Kamonohashi's Forbidden Deductions''. 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. Episodes Season 1 (2023) Season 2 (2024) Stage play A stage play adaptation ran from November 1–4, 2024, at the Nippon Seinenkan Hall in Tokyo, and on November 9 and 10 at the Sankei Hall Breeze in Osaka. It was written and directed by Keita Kawajiri, with music composed by Futoshi Arai. ==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. 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. 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. ==Notes==