Numerous artists have used the name Machine, including: 1. HAKUEI (vocals) and Kiyoshi's (guitar) duo. Started in 1999. Hakuei's also PENICILLIN's vocalist and has a solo career, Kiyoshi has been in bands like media youth and Spread Beaver, as well as on a solo career. Machine began making fast, hard rock with a large emphasis on layers of post-production electronic work. As time progressed, Machine began to focus on a more straight-rock sound, while still incorporating elements of their older material sporadically.