Kōtarō Isaka

Kōtarō Isaka is a Japanese author of mystery fiction, best known for his Hitman novel/manga series, including Maoh: Juvenile Remix (2007–2009), the first of which, 3 Assassins, was adapted as a Japanese feature film, Grasshopper (2015), and the second of which, Maria Beetle, was adapted as an American feature film, Bullet Train (2022).