This film begins with a young man named "Saburo" (Akira Nitta) returning to an island where he was spent his teenage years at a reform school. While there he was brutally beaten by a guard named "Daigaku Otake" (Rentaro Mikuni) to the point that the people living on a nearby island thought he had been killed. So, having now returned after 20 years, he is filled with a terrible need for revenge. However, it is also during this time that he meets a beautiful young woman named "Aya" (Shima Iwashita) who he develops a friendship with. The problem is that Aya just happens to be the daughter of Daigaku. Now, rather than reveal any more, I will just say that this was an interesting movie which adds more details as the plot develops and gives more clarity for Saburo's quest for vengeance. In addition to that, the film also culminates with a surprising twist at the end as well. That being said, while I would have preferred a more drawn out ending, I still enjoyed this film for the most part, and I have rated it accordingly. Above average.

Masahiro Shinoda is one of the last living director's from Japan's golden age of films, and while this isn't one of his best known films, I'd say it's one of the best of the ones I've watched so first.

The plot of Captive's Island starts simple - with a man who was once abused in a harsh island reform school as a boy returning there for revenge - but things get more complicated as the film nears its conclusion (as plots often like to do).

This benefits from its unique setting and great visuals, as the island setting really helps elevate the mood and tension of the otherwise fairly standard revenge story, as well as the film's simple but decent enough characters. One part that did stand out was a static long shot that lasted well over five minutes in the climax- it really added to the effectiveness of the ending.

With a runtime under 90 minutes, it never drags too much despite the leisurely pace and simple premise. It's a very good, well-made movie. Nothing incredible, but overall not much to fault, either.