The Machine Girl was the story fetishized story of a high school girl whose arm is replaced by a giant machine gun. RoboGeisha appears to be a story about really, really deadly robotic geishas. You really just have to watch it to understand. But even then, you still won't understand.
There are several moments in the trailer where I was like, "Wow, I've never seen that in a movie before." I mean, I've seen breast cannons (who hasn't?), but I've never seen someone stabbed in the eyes with fried shrimp. Nor have I seen armpit swords, or ass katanas for that matter.