Although the title sounds like it came from an '80s dance movie or a low-budget porn, "Muscle Heat" is actually a fairly decent action movie. Starring Kane Kosugi as Joe (son of Sho Kosugi), it takes place in Tokyo in 2009, although isn't really far out enough to be considered sci-fi. Joe is a US marine who is courtmartialed for refusing to follow orders (revolving around shooting kids), and he is set free by Aikawa Show, who plays Japanese detective Aguri Katsuragi, and given "amnesty" (for reasons that are unclear) to go to Japan (which is in a severe depression and has pretty much gone to hell) to work with Aguri in stopping the illegal drug trade in "blood heat", a powerful and addictive drug, and stopping the lead dealer, Rai (played by Masayo Kato, from Beat Takeshi's "Brother", and Takashi Miike's "Araburu Tamashitachi"). Even though Kane's acting ability consists of a permanent scowl, the actions scenes are good, solid martial arts fighting, and good gunfight action, reminiscent of "Returner". The Sledgehammer fight scene at the end is something new, and worth a look. Not much in the way of complicated plot, but Aikawa Show is always worth a look when he is shooting people, and even though Kane Kosugi isn't much of an actor, he knows how to throw an impressive kick. And keep an eye out for Takenaka Naoto, who plays a greasy street bookie - I swear that guy is in every Japanese movie ever made...