Copkiller , originally released in Japan as Terror 21 in 1974 and re-edited for U.S. audiences in 1983, is a crime action film with a convoluted narrative involving convicts, a botched bank robbery, and a cop-kidnapping subplot. The 1983 American edit of the Japanese film required subtitles to translate the original Japanese dialogue into English. Subtitles were essential for international audiences, ensuring accessibility and comprehension for non-Japanese speakers.