After his father is killed, a young yakuza comes back to Japan for revenge - and a machine gun for an arm.
The IMDB excerpt doesn't give it justice though! It's so much more than that, and the aforementioned weapons don't play a role until a fair bit in.
I usually complain about crappy special effects, but when they're intentionally crappy, and in a stylefully violent way, and as crazy and kick-ass as this... I can't complain at all. It's a gang movie on a whole other level. The Japanese one. And it's all about loyalty.
The weaponized lady was something else too (memorable short creative nude battle scene alert), and whomever Ken Isihikawa was he must've been bad-ass. If you don't mind a little out of this world action you're finna love this.
rated 4.5/5: almost awesome