Key Hunter (キイハンター, Kī Hantā) is a prime-time Japanese television detective series. It aired on Saturday nights in the 9:00–9:56 p.m. time slot on the Tokyo Broadcasting System (TBS) network from April 6, 1968 to April 7, 1973. There were a total of 262 episodes, and it was one of the most popular action dramas in Japan at the time. The story involved "Key Hunter", a special clandestine unit of the International Police, which endeavored to solve various crimes.