This is a live action Japanese movie. Like a lot of action themed anime films, it has plenty of action and fighting and battles, and of course over-the-top violence (often with so much blood and graphic injuries that it seems to be a parody on violent movies, rather than being intended to be taken seriously as a violent action movie itself).
Basically the story has something to do with this teenage girl who's parents have been killed by the Japanse mafia (it's been a while since I last saw it, but this is how I remember it), and now she's out for revenge. She also lost her arm to an attack from the mafia, and in its place she got a gattling gun, rather than a normal prosthetic arm! What an epic way to blast through all your enemies!
Here's a picture of a promotional poster for the movie.
And here's a trailer.
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