Born in Osaka, Kouhei Matsunaga is a musician and a drawing artist. He started drawing during childhood under the influence of his grandfather. He grew up listening to hardcore-techno and hip hop, studied architecture and has been mainly making music since 1992. Under many different aliases (NHK, NHKyx, Internet Magic, Koyxen) he has released numerous albums on labels such as Skam Records, Wordsound, Raster Noton and his first ever album "Upside Down" on Mille Plateaux in 1998. He has also collaborated with artists like Merzbow, Jungle Brothers' Sensational, Autechre's Sean Booth, Mika Vainio, C..