Kakuto (2002)

Ryo is given the job of selling a smoke carton full of ecstasy by a big yakuza boss. While at the bosses place he gets high on both acid and cocain. Later, while leaving, he accidently drops the carton. Later he meets up with two friends and realises he's lost the ecstasy. The three friends drive around for a while until Ryo remembers he must have dropped it just outside the bosses place, only thing is he cant remember where the apartment building was. They find the place eventually but just as he is going in the yakuza boss, who now suspects him of leaking info to the heat is just outside, along with a police officer who has been tailing the boss for a while. Ryo gets chased with a samurai sword by the boss, meanwhile the boss is being chased by the cops. The boss gets arrrested eventually and Ryo gets away. His trip turns very bad and he ends up running the streets naked in winter, crying and passing out. Eventualy he finds both his friends and the carton full of E, and all turns out well.