The story is about life in the slums of postwar Osaka. People have to rely on their street smart skills to survive as they do not have proper jobs.
Liked the nice song by Takeshi but was quite confused about the complex schemes thought up by Hanoko and the rest of the gang members to make money! Among the few films about postwar Japan that I have seen, I think I enjoyed "Pigs and Battleships" by Imamura and "Gate of Flesh" by Seijun Suzuki better.
Internet Movie Database Link