There is more than one artist with this name. Karen is an incorrect tag for 電気式華憐音楽集団. Karen is an incorrect tag for the enka singer and the visual kei band カレン. 1) KAREN is a side project formed by two members of ART-SCHOOL (Kinoshita Riki (vo/gu) and Todaka Masafumi (gu)), and two members of downy (Nakamata Kazuhiro (bass) and Akiyama Takahiko (dr)) and the vocalist of On Button Down, Achiko. The band started activities in 2005 by doing some live shows.