, was the pen-name of a popular Japanese crime fiction writer active during the Shōwa period of Japan. His real name was Takagi Seiichi. Biography Takagi was born in Aomori City in Aomori Prefecture in northern Japan. He graduated from the Daiichi High School (which was often abbreviated to Ichi-ko) and Kyoto Imperial University, where he studied metallurgy. He was employed by the Nakajima Aircraft Company, but lost his job with the prohibition on military industries in Japan after World War II. On the recommendation of a fortune-teller, he decided to become a writer. He sent the second draft of his first detective story, The Tattoo Murder Case, to the great mystery writer Edogawa Ranpo, who recognized his skill and who recommended it to a publisher. It was published in 1948. He received the Tantei sakka club sho (Mystery Writers Club Award) for his second novel, the Noh Mask Murder Case in 1950. Takagi was a self-taught legal expert and the heroes in most of his books were usually prosecutors or police detectives, although the protagonist in his first stories was Kyosuke Kamizu, an assistant professor at Tokyo University. Takagi explored variations on the detective novel in the 1960s, including historical mysteries, picaresque novels, legal mysteries, economic crime stories, and science fiction alternate history. In The Informer (1965), a former Tokyo stock exchange worker is fired because of illegal trades. A subsequent stock market crash means that he has no hope of returning to his old career and therefore he accepts a job from an old friend even though he eventually discovers that the new firm he works for is really an agency for industrial espionage. The plot is based on actual events. Behind the writer, there is also the photographer passionate about traditional Japanese tattooing. Takagi came into contact with the Tokyo tattoo scene while writing his first novel (Shisei Satsujin Jiken, 1948) and began to document it. In the 1950s, he photographed the greatest tattoo artists of the time, their clients and their tattoos, thus creating an archive that is as unseen as it is rare. Discovered in 2017 by French journalist Pascal Bagot [archive], a specialist in tattooing in Japan, these images - of an unexpected quality for a non-professional - were collected in a book entitled The Tattoo Writer [archive] and published in 2022. They establish him as one of the most important witnesses to the