Joker Game

"Joker Game" (ジョーカー・ゲーム) is a Japanese short story mystery spy novel series written by Koji Yanagi, also known as the "D Agency series." Set in 1937, before the outbreak of World War II, it tells the story of the "D Agency," a spy organization formed by Lieutenant Colonel Yuuki of the Imperial Japanese Army, and its members carrying out various secret missions. The members of the D Agency are not from the military but are elites recruited from various fields, who undergo rigorous training and are taught "don't kill, don't get killed, don't get captured." The series is known for its tense plots, clever schemes, and unconventional spy philosophy. It has been adapted into various forms, including live-action films, manga, and anime, and is loved by readers and viewers. The series includes novels such as "Joker Game," "Double Joker," "Paradise Lost," and "Last Waltz." Among them, "Joker Game" won the Yoshikawa Eiji Prize for New Writers and the Mystery Writers of Japan Award in 2009. The anime adaptation, produced by Production I.G, aired in 2016, further boosting the series' popularity.