Tadashi Agi

Kindaichi is off on yet another case, this time in Shanghai. When the father of a Chinese friend of the youngKindaichi is murdered at the circus, it is up to the ever-resourceful and clever young high-school detective to solve the case. But hidden in the background is the 4000 year-old legend of the Shanghai Mermaid. (mydramalist.com)

Kyuu is your average boy with a knack for logic and reasoning. Desiring to become a detective, he finds out about the existence of the Dan Detective School (DDS); a famed school where students are allowed to bear arms. Together with Megu, a girl with photographic memory, the martial arts master Kinta, the genius programmer Kazuma and the mysterious Ryuu, Kyuu tackles many well planned out crimes, always seeking the truth. (myanimelist.net)

Tantei Gakuen Q revolves around a team of genius students studying in a detective academy run by a famous detective, Morihiko Dan. (kissasian.com)

Notebooks that foretell deaths, numerous urban legends, and murders with no clues... a series of strange incidents occur, and people are lead into a deep labyrinth of mysteries. Five fledgling teen detectives of the Dan Detective Academy, which was founded by the legendary and renowned detective, Morihiko Dan, work together to solve such difficult cases. Stealthily at work behind the strange incidents is an evil crime syndicate called the "Meiosei". (myanimelist.net)

Four years into the future, the world has lost its balance... 10 thousand metres of vast woodland is gone, preventing humans to live and leaving a desert to spread endlessly. And so, they head into the world of Meshichi, to live together with the Anbots. As if guided by fate, Sanzou and Gokyuu meet. (myanimelist.net)

On their way to the hot springs, Hajime and his companions get lost in an abandoned village, where they discover a murder case involving vampires.

Kindaichi, Miyuki and Kenmochi arrive at the condemned opera house in the pouring rain and are met with an ominous announcement from its phantom.