G-Men '75 was a Japanese crime drama television series, about a fictional undercover unit of the Tokyo Metropolitan Police Department. It was created by Teruo Kondô, who had previously created the detective show Key Hunter. Tetsurō Tamba starred as Detective Superintendent Tetsuya Kuroki, and was the only actor to appear in all 355 episodes. Other starring roles were played by Yosuke Natsuki, Yasuaki Kurata, Yū Fujiki, Gō Wakabayashi and Bunjaku Han.