Crazy Ken Band (クレイジーケンバンド), also referred to as CKB, is a Japanese musical group formed in 1997 by its lead vocalist, writer and composer Ken Yokoyama.
The band first came together in 1991 under the name "CK's", with a four-member lineup: Ken Yokoyama, Keiichi Hiroishi, Masao Onose and Shinya Horaguchi.
In 1997, Keiichi Nakanishi became the fifth member and the group's name was changed to "Crazy Ken Band".
In 2003, HMV Japan ranked the band at #98 in their "Top 100 Japanese pops Artists".
[3] "December 17" (12月17日) and "Kuroi Kizuato no Blues" (黒い傷跡のブルース), two songs from Galaxy, were featured in the 2006 video game Yakuza 2.