"Much of cyberpunk is rooted in the New Wave science fiction movement of the 1960s and 1970s, when writers like Philip K. Dick, Roger Zelazny, John Brunner, J. G. Ballard, Philip José Farmer and Harlan Ellison examined the impact of drug culture, technology and the sexual revolution while avoiding the utopian tendencies of earlier science fiction. Released in 1984, William Gibson's influential debut novel Neuromancer would help solidify cyberpunk as a genre, drawing influence from punk subculture and early hacker culture. Other influential cyberpunk writers included Bruce Sterling and Rudy Rucker. The Japanese cyberpunk subgenre began in 1982 with the debut of Katsuhiro Otomo's manga series Akira, with its 1988 anime film adaptation later popularizing the subgenre."