The members of Buck-Tick came together in 1983 and have maintained a consistent lineup since 1985. The band decided that their first vocalist did not fit and the drummer took over vocal duties. They then recruited the bassist's older brother to become their drummer. Buck-Tick made their indie label debut in 1986 and their major label debut in 1987.
Tsutomu Nakayama - contributed keyboards on Sexual XXXX! (1987), Aku No Hana (1990), and Kurutta Taiyo (1991).
Kazutoshi Yokoyama - he has been regularly contributing keyboards, electronics, and noise elements since Koroshi No Shirabe (1992). He first became involved with a member of Buck-Tick when he worked on Hide's solo song "Jarring Voice" (1991) for the Dance 2 Noise 001 compilation album.
Kazutoshi has also worked with Hisashi's side projects Schaft and Lucy, as well as the Atsushi/Hisashi side project Schwein.