A long-standing gang war on the streets of Hiroshima escalates despite police pressure in this, the fourth film in Kinji Fukasaku's Yakuza Papers series. It's 1964, and with the Tokyo Olympics turning the eyes of the world to Japan, lawmen have set out to keep the Yakuza -- Japan's organized crime system -- out of sight. While dozens of low-level mobsters are thrown into jail, crime lord Takeda (Akira Kobayashi) attempts to keep the peace for the best of all parties on the wrong side of the law. But when a high-ranking Yakuza figure is killed by a low-level "mechanic" in a moment of anger, an explosion seems imminent. Meanwhile, gangster Shozo Hirono (Bunta Sugawara) sees an opportunity to use the chaos to settle a score against a mobster who had done him wrong years before. Jingi Naki Tatakai: Chojo Sakusen (aka Yakuza Papers, Vol. 4: Police Tactics would be followed in 1975 by Jingi Naki Tatakai: Kanketsu-Hen (aka Yakuza Papers, Vol. 5: Final Episode), the last film in the series.