Murai Kenjirou is known for being the bassist of the band cali≠gari, later in SEX MACHINEGUNS and currently in CYCLE under the name "SAMURAI W. KENJILAW". Other works include MAG-NET and PSG〜Picopico Sound Generation〜.
Kenjirou appears credited on Klein Kaiser's "freeza" CD along with Katou. Also, his name appears in various promotional flyers of the first Kakuu no hitobito live events.
Kenjirou released a CD under the name of MKG (Murai Kenjirou Group) in a cali≠gari CD-BOX release with 4 CD's containing each members' different works, ,called "Cali gari janai janai (T-T)", MKG's drummer was ex-Klein Kaiser's drummer, Katou Tomohiro.