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'' (2004, Japanese; 2022, English), was adapted as a Japanese feature film, ''Grasshopper'' (2015), and the second of which, ''Maria Beetle'' (2010, Japanese; 2021, English), was adapted as an American feature film, ''Bullet Train'' (2022). Provided by Wikipedia