Credited with being on of the first Visual Kei bands.
Current Members
Toshimitsu "Toshi" Deyama – vocals (1982–1997 2007–present)
Yūne "Sugizo" Sugihara - lead guitar, violin, backing vocals(2009–present)
Tomoaki "Pata" Ishizuka - rhythm guitar (1987–1997, 2007– present)
Hiroshi "Heath" Morie Hiroshi – bass, backing vocals (1992–1997 2007–present)
Yoshiki Hayashi – drums, piano (1982–1997, 2007–present)
*Hideto "hide" Matsumoto - lead guitar, backing vocals (1987–1997) Although hide is deceased, the band still considers him a member and ntroduces him at every concert.

Back up Members
Taiji Sawada – bass, backing vocals (1985, 1986–1992)
Isao – guitar (1987)
Satoru Inoue– guitar (1986)
Masanori "Kerry" Takahashi – guitar (1986)
Hikaru Utaka– bass(1985–1986)
Hisashi "Jun/Shu" Takai– guitar (1985, 1986)
Mita "Zenon" Kazumitsu- guitar (1985–1986)
Yoshifumi "Hally" Yoshida– guitar (1985)
Kenichi "Eddie Van" Koide –guitar (1985)

X Japan is credited with being the pioneers of the Visual Kei movement, making it more popular.
X also is opening the doors and expanding to many, many countries. Their leader, Yoshiki, is also trying to connect East and West through his radio show, Yoshiki Radio.
Yoshiki also produced Dir en Greys first 5 singles.