Detective School Q (2003)

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!

In an alternate version of the present, Tokyo has been decimated by a shocking terrorist attack, and the only hint to the identity of the culprit is a bizarre video uploaded to the internet. The police, baffled by this cryptic clue, are powerless to stop the paranoia spreading across the population. While the world searches for a criminal mastermind to blame for this tragedy, two mysterious children - children who shouldn't even exist - masterfully carry out their heinous plan. Cursed to walk through this world with the names Nine and Twelve, the two combine to form "Sphinx," a clandestine entity determine to wake the people from their slumber - and pull the trigger on this world.

Detective Ukyo Sugishita confronts crime on the basis of his own convictions. He has a partner that works for him in the Special Task Unit. For the first 7 seasons, Ukyo’s first partner is Kaoru Kameyama. He is a good-natured, hot-tempered, straightforward and somewhat scattered detective. Beginning in Season 8, Takeru Kanbe replaces Kameyama. Contrary to his predecessor, Takeru is a lanky, cool, conceited and confident detective. From Season 11 to Season 13, Ukyo’s partner is a young detective Toru Kai. Toru is a son of Deputy Director-General of The National Police Agency. But he became a detective by his own effort. And starting with Season 14, Ukyo’s current partner is Wataru Kaburagi, an elite bureaucrat who came to the Metropolitan Police Department on temporary assignment. As the first partner without any career of a police officer, he will face challenging cases together with Ukyo.

A silhouetted suspect moves to the crime-infested town of Beika with murder in mind.

Ryo Saeba works the streets of Tokyo as the City Hunter. He's a "sweeper" and with his sidekick Kaori Makimura, he keeps the city clean. People hire the City Hunter to solve their dangerous problems, which he does with a Colt Python. When Ryo's not working on a case, he's working on getting the ladies, and Kaori must keep him in check with her trusty 10 kg hammer.

In the fictional town of Neptune, California, student Veronica Mars progresses from high school to college while moonlighting as a private investigator under the tutelage of her detective father.

Mikoto, a forensic investigative examiner, and her partners trace down the evidence of crimes and unravel the puzzles behind mysterious deaths.

"ACCA" is a giant unified syndicate residing in a kingdom split into 13 autonomous regions. ACCA was formed back when there was threat of a coup d'etat, and has continued to protect the peace for almost one hundred years. Jean Otus, vice-chairman of the inspections department at ACCA headquarters, wanders through the 13 districts, checking to see if there is any foul play afoot. His quiet everyday life slowly gets swallowed up into the world's conspiracies!

When Yu Narukami moves to the rural country town of Inaba to live with his uncle while his parents are away on business, he's expecting a lot more peace and quiet than he's been used to in the big city. Instead, the peace has been shattered as a rash of mysterious murders and kidnappings sweep the countryside. With the police stymied, Yu finds himself joining with a group of seven other teenagers in a desperate bid to solve the mystery. A mystery that is somehow connected to both the local weather patterns and a strange TV world which Yu, his friends and the enigmatic killer can all enter.

A detective who's also a public security agent and a member of a shadowy organization juggles his triple identities.