WACK

 (WACK Co., Ltd., ワック) is the Japanese music production company of manager Junnosuke Watanabe.

Groups

 * BILLIE IDLE® (production)
 * BiS (management, production)
 * BiSH (management)
 * EMPiRE (management)
 * GANG PARADE (management)

Shuffle units

 * SAiNT SEX