This movie doesn't seem like it could be serious, but it is, if you replaced the geisha with Jack Black everything would make sense. Handicap gun? Fried Shrimp? Butt katanas? Bust machine gun? I am pretty sure I saw someone get their anus cut as well.
Also, did anyone notice something odd about the buildings 2 minutes into the trailer.
Yes, they were bleeding, the buildings were bleeding.