Captive's Island (処刑の島, Shokei no shima, lit. Execution Island), also known as Punishment Island, is a 1966 Japanese drama film directed by Masahiro Shinoda. The screenplay by Shintarō Ishihara was based on the novel Ryujinjima ni nite by Taijun Takeda. The film probes deep into the damaging effects of the Japanese Imperial system on individuals. It concerns the story of a young man who travels to an island to punish the man who had murdered his family and brutalized him twenty years prior, but he develops feelings for the man's daughter which tests his resolve to carry out his revenge. The film makes extensive use of flashbacks, cutting forward and backwards in a free-form multilayered structure, to illustrate how the past casts a shadow over the present.