Kitsutsuki Tanteidokoro

The story is set in 1909 during Japan's Meiji era, and centers on fictional versions of real-life poet Takuboku Ishikawa (right in picture above) and real-life linguist Kyousuke Kindaichi, who were acquaintances in real life. In the novel, Takuboku runs a private detective agency to support his family. Both begin to investigate a case of supposed ghost appearances at the Asakusa Juunikai building, also known as the Ryouunkai.