Mild mannered Nobuyuki Shamoto (Mitsuru Fukikoshi), owner of a modest tropical fish shop, lives with his pretty teenage daughter Mitsuki (Hikari Kajiwara) and surprisingly hot second wife Taeko (Megumi Kagurazaka); sadly, the women in his life do not see eye to eye (to put it mildly). When Mitsuko is caught shoplifting, Yukio Murata (Denden), a successful businessman who also sells exotic aquatic livestock, steps in and gets Mitsuki off with a warning. Brash, charismatic, and cunning Murata uses this as an opportunity to begin manipulating the grateful Shamoto family, offering desperate Mitsuki a job as one of his store girls (all of whom are pretty, and wear tight vests and short shorts!), bringing meek Yukio under his wing as his apprentice, and sneaking a shag with the not-very-content Taeko.
Murata also reveals to a Nobuyuki his unique method of dealing with difficult acquaintances: he poisons them and then, with help from his obedient and rather sexy wife Aiko (Asuka Kurosawa), takes the bodies to a remote shack where he makes them 'disappear' (ie., chops them up, burns the bones, and sprinkles the remains in the woods). When Murata insists that Yukio help dispose of a victim, he is too shocked and scared too refuse; now, as an accomplice to murder, he finds himself trapped by the over-bearing and frankly quite scary Murata—fearful not only for himself, but also for the lives of his wife and daughter.
However, a man can only be pushed so far: after several more stomach-churning visits to the shack, learning of his wife's infidelity, suffering a beating from Murata, and being forced to have sex with Aiko (the poor guy!), Nobiyuki finally snaps, attacking Mr and Mrs Murata with a biro (not the greatest of weapons, perhaps, but it does the trick). Now it is time for Yukio Murata to disappear, with Mrs. Murata only too happy to help, clearly turned on by the fact that Nobiyuki has at last grown a pair. The now empowered Nobiyuki also sets about straightening out his ungrateful wife and daughter, using methods definitely NOT sanctioned by most family guidance counsellors.
Other reviews here on IMDb comment on what a harsh viewing experience Cold Fish is, with its brutal murders, bodily dismemberment, rape and in your face gore; but while it's certainly not what I'd call family viewing, I wasn't too fazed by the extreme content, finding much of the film darkly humorous rather than disturbing (but then I've watched a fair few gruesome Asian movies in my time, and am probably a tad desensitised). Indeed, I was ready to dismiss the film as a far-fetched and overlong wish-fulfilment fantasy for downtrodden Japanese males, when I decided to watch the interview with investigative journalist Jake Adelstein on the extras disc, something that altered my perception of the film slightly. Although the beginning of Cold Fish had stated that it was based on a true story, I had taken this with a large pinch of salt (so many movies make this wild claim); as it happens, most of what director Shion Sono depicts proves to be not all that far from the truth (at least until Nobiyuki snaps), making his film a lot more chilling in retrospect.
