Közi's career began at the end of the 1980s in two bands, Girl'e and Beyond The Reinsight. Information about these bands is
very scarce. In 1991 he joined Matenrou (also known as Matenrow) with future Malice Mizer member Mana and released two demo
tapes. Mana and Közi left Matenrou after deciding they both had similar ideas about creating music. They formed Malice Mizer
in 1992. After Malice Mizer disbanded in 2001, Közi joined Haruhiko Ash and created Eve of Destiny, an industrial rock band
that toured outside of Japan, performing at various festivals in Europe.
On May 2007, Közi released a live DVD, featuring a collage of his lives from 2004-2006.