deffintly 'Dead Leaves' the actions almost never stops except twice for like 30 seconds each time.

take from some anime site:
"Dead Leaves is very crude, you see. It is senselessly violent. It dwells on bodily functions. One of its more important secondary characters has a drill for a penis, and uses it liberally. The two main characters, Retro and Pandy, have violent sex with one another on a complete whim. Skulls are crushed. About eight million bullets are fired. The first cop dies fifteen seconds in, and I’m still not really sure why. So lets back up."