Hakuryu 3: Ruthless Battle Royale (2007)

A shocking scandal of unethical human experimentation by a major corporation is exposed. Hakuryu, a composed and perceptive yakuza, confronts the corporation and endures a barrage of threats. Tatsuya Shirakawa, the young leader of the Kurosu clan, learns from a new associate, Toshio Hatakeda, that Sekai Pharmaceutical is coercing its employees into taking a risky experimental drug. It turns out the company is secretly conducting experiments on people, compelling Shirakawa to intervene once more.