Adrift in Tokyo (2007)

Takemura has no friends and no family. He's a student but he doesn't have any particular ambitions. In other words, he isn't going anywhere fast. Were all this not enough, the sorry sad sack has a debt of 800,000 yen. Fukuhara, a surly debt collector with a glorious mullet, is on his case. After roughing Takemura up, he gives him an ultimatum-72 hours to pay up, or else.
Takemura barely has his wits about him again when he runs across Fukuhara a second time, and this time the thug has a different proposal-a walk. That's right, in exchange for a million yen, Takemura must accompany Fukuhara on a walk across the city of Tokyo. Starting in a distant corner of the city, they begin their trek towards downtown, striking up a conversation.
It's at this point that Fukuhara admits that he's recently killed his wife, and intends to turn himself in at Kasumagaseki police station-because, he says, it's the finest in town. The pair's itinerary, however, is hardly a quick and direct one. The disparate duo drift here and there, hanging out and coming across a host of eccentric personalities, creatures of the urban jungle's various habitats.
As their walking, talking and trading truths continues, the arrangement between Takemura and Fukuhara starts to transform into friendship.