Dempagami.inc is an all girl Denpa band from (you guessed it) Japan who are famous for their cover of the Beastie Boy's classic "Sabotage"
You can read more about that here.
The video above is Dempagami.inc staring in their very own 70s style moustachioed cop show set in San Fransisco. Seriously, Hollywood, why the fuck are you bothering with Batman vs Superman when this could be made into a film. *Sigh* Priorities people.