Karakuri Circus (Japanese: からくりサーカス, Hepburn: Karakuri Sākasu, lit. 'Mechanical Puppet Circus') is a Japanese manga series written and illustrated by Kazuhiro Fujita. It tells the thrilling story of Masaru Saiga—a young heir suddenly thrust into a perilous world—whose life becomes entangled with both human and supernatural threats. Alongside him are Narumi Katō, a martial artist with a rare condition that forces him to keep others laughing, and the enigmatic guardian Shirogane, whose mastery of puppetry adds an extra layer of mystery.