'Ron Kamonohashi's Forbidden Deductions') is a Japanese manga series written and illustrated by Akira Amano.

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.

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found responsible via temporary insanity for a deadly incident known as the "Bloody Field Trip", his detective license was revoked and he was expelled.

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.

[16] The series has been licensed for simultaneous publication in North America as it is released in Japan, with its chapters being digitally launched in English by Shueisha on its Manga Plus service.

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.

[52] 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.