"Battle Without Honor or Humanity" (バトル･ウィズアウト･オナー・オア・ヒューマニティー) is an instrumental by the Japanese rock musician Tomoyasu Hotei.
On the film's soundtrack, the piece is titled "New Battles Without Honor and Humanity Theme" (新・仁義なき戦いのテーマ, Shin Jingi Naki Tatakai no Tēma).
The piece was introduced to Western audiences three years later in Quentin Tarantino's Kill Bill Volume 1 and its soundtrack, where it was retitled "Battle Without Honor or Humanity".
The song continues to be used in a variety of media worldwide, frequently placing it on JASRAC's annual list of the highest-grossing Japanese music recordings based on international royalties.
The song also appears in the Gran Turismo HD Concept trailer for the PlayStation 3, and as DLC for the multi-platform game Rocksmith 2014.