仁義なき戦い
Rock musician Tomoyasu Hotei, who plays Tochino Masatatsu, wrote the soundtrack to the film. Its title piece would be reworked and retitled "Battle Without Honor or Humanity" and go on to become a hit both in Japan and internationally. The film was followed by "New Battles Without Honor and Humanity/Murder", or "Another Battle/Conspiracy", directed by Hajime Hashimoto in 2003.