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In the early Showa period, the story begins when a young girl is found dead in a creek in Tokyo. Officer Sawatari, the police officer in charge of the investigation into the body, catches the eye of one Namidako Inukai, the founder of a new religious organization. (Source: ANN)

The Layton Detective Agency, a business that helps its clients solve unusual mysteries, is run by Katrielle Layton—daughter of the world-renowned archaeology professor Hershel Layton. Together with her assistant Noah Montoir and talking dog Sherl, Katrielle finds herself unraveling cases involving a newly purchased cursed house, a dress imbued with a "demon's curse," and the zombie of a client's deceased spouse, just to name a few. Aside from her more quirky cases, Katrielle has been working on another unsolved problem: the disappearance of her father. Founding the agency was only the first step in her attempt to uncover the truth behind his vanishing. As she continues to take on client after client, each with wackier and stranger issues to tackle, Katrielle steadily closes in on the answer to the biggest mystery of her life. [Written by MAL Rewrite]

Kirishima Mel seems like your ordinary high school girl, however, she is also part of a special investigation team called "K9"—under the direct control of the National Police Agency! With her katana in hand, Mel must take on serious incidents in secret. But what happens with this one incident!? (Source: CoyoMoose)

Based on Shinji Wada's Sukeban Deka manga, the Toki wo Kakeru Sukeban Deka manga's story centers on a high school girl named Tomoe, who is talented in karate, but lacks self-confidence and has a timid personality. She gets involved in a riot one day, and a mysterious man tells her to become a Sukeban detective. Tomoe travels across time and space, and meets another Sukeban detective, Saki Asamiya. (Source: ANN)

The story of a private detective that resolves crimes and defends random women that fall in love with him.

Hajun, who lost his parents and lived with his grandmother, has become a police officer to uncover the truth behind his parents' deaths, but life as a patrol officer is far from the detective career he once dreamed of. It's nothing but exhausting. "I wish legendary detectives would appear and give me a clue about the case." Feeling frustrated, he visits the old vinyl house where he once lived with his parents... There, he finds a book that belongs to his father. When he opens the book, what appears before Hajun's eyes are legendary murderers? (Source: Kakao Entertainment, translated)

A nude female body was found in Shibuya, with traces of sexual intercourse on the it. Four women from the Sexual Crime Investigation Squad began to investigate the case, but as they digged deeper into the incidence, they themselves got dragged into the heart of this dark event...

Sugaru, a remote village that doesn’t even appear on any maps. In this village, there were daughters of a family that inherited the power of a god for more than a thousand years. They were called "Sugaru-sama" and ruled the village for generations. In 1985, a girl who was a candidate to be Sugaru-sama's successor is found dead with her head cut off. Detective Misasagi Mikage, a beautiful girl with a jade left eye wearing a suikan, takes on the case. Mikage, whose mother is a legendary detective, discovers facts that the police have overlooked one after another and seems to be getting to the bottom of the matter. However, the case produces a second and a third victim... (Source: Bungeishunju, translated)

n a town where martial artists - known as "Murim users" - run amok in the underworld, the Murim Investigation Unit, a group of elite martial arts practitioners, acts as a suppression and investigation force. The story begins when one of the senior members comes across a thuggish young man beating up a bunch of gangsters, and decides to bring him in. (Source: MU)

Great Horse tells the story of detective Soga Kenji, who while being an elite takes it upon himself to investigate a dangerous weapon smuggling criminal ring.

A spinoff of Shinji Wada's Sukeban Deka manga, Sukeban Deka Pretend centers on Asami, a cheerful girl who attends Takanoha High School. The story begins when she encounters a mysterious yo-yo and a mysterious girl. (Source: ANN, edited)

Contains several short stories: 1. Hawk Jack 2. Misdirection 3. Nondescript 4. Mamotte Agetai

Centered around around a feminine-looking young man called Boy, who works as an undercover investigator for the police. His work usually requires him to disguise as a woman. (Source: MU)

Akutagawa is a death row inmate convicted of 15 counts of murder, though he insists on his innocence. He has a deal with the police: every time he solves a case, his execution is postponed for another day.

Contains several stories: 1. Go! The Policeman 2. Like a Mutation 3. Hanamaru Kids

This is the earliest Koban work and contains Cases 1-11 and a side story about Hanazono that were published in either Jump SQ or as doujinshi.