Both are about betrayal and revenge in the yakuza world. "Ambition without honour" is a hommage to the film "Battles Without Honor and Humanity" directed by Kinji Fukasaku in the first half of the 70's.
Both are about the self-destruction of the yakuza world. "Graveyard of honour" is a remake of Kinji Fukasaku's 1975 film of the same name, which is based on the life of a real-life Yakuza member.
