Bad Boys (Japanese: 不良少年, Hepburn: Furyō Shōnen) is a 1961 Japanese pseudo-documentary drama film about juvenile delinquents, written and directed by Susumu Hani.

After his arrest for theft in a jewelry store, juvenile delinquent Asai is sent to a reform school.

He befriends Debari, who was sentenced for repeated mugging with his gang and urges Asai to wise up and not end like him.

Asai is eventually released, facing an uncertain future.

Since Hani had a background in documentaries, he shot Bad Boys, his first feature-length fiction film, in a documentary style, using "nonprofessional actors, black and white, hand-held cinematography, and location shooting.