Enter the Ninja is the 1981 action film starring Franco Nero, Sho Kosugi, Susan George, Christopher George, Alex Courtney, and Constantine Gregory that arguably launched the resurgence of martial-arts movies in the 1980s, specifically the Ninja genre. It was the first of what is called the "Ninja Trilogy," consisting of this film, Revenge of the Ninja, and Ninja III: The Domination. This film has no ties to the other two films, aside from featuring real-life ninjitsu practitioner Sho Kosugi (although he plays different characters in each film). In this film, Nero plays an American who goes to Japan to study ninjitsu. Kosugi plays Hasegawa, a ninja whose family lineage traces back to the ancient samurai, and does not believe an American should be allowed to be trained as a ninja. The film opens with a massive fight scene, which we eventually find out is Cole's final test to become a ninja. Once he graduates, Cole goes to Manila to visit his old war buddy, Frank Landers, who owns a plantation and is being pressured to sell his land by a wealthy CEO named Charles Venarious (played by Christopher George). When Cole dispatches his goons with ease, Venarious hires a ninja (Hasegawa) to take Cole out.
The 4k release is a two-disc set containing a UHD disc (which just contains the film) and a standard Blu-Ray, which contains the film and the bonus content. The A/V quality of the UHD disc is excellent, and it is an upgrade over prior releases. The bonus content includes a commentary track by film historians Mike Leeder and Arne Venema, and trailers for several other films, including Koshugi's other movies.
The movie itself is very cheesy and not particularly well-written or acted. It very much has the feel of a low-budget action film with some cheesy comedy sprinkled in here and there. The commentary track is quite interesting as Leeder and Venema give a pretty good breakdown of the film's interesting production history, including the fact that martial artist (and the guy who broke up Elvis and Priscilla), Mike Stone, was originally supposed to play the role of Cole. However, when the producers found out that Franco Nero was in the Philippines, they offered him the role despite the fact that he had no martial arts experience (which absolutely shows when he is doing action scenes), and Stone was relegated to being his stunt double and the fight coordinator. Having Stone in the role would have at least made Cole look the part, as Nero was hilariously bad during the fight scenes and could not even do a proper front kick, much less do anything that came close to looking like a trained ninja. You can also tell the movie did not have anyone paying attention to continuity, because in the opening sequence alone Cole would have a bow and arrow in one scene, then have two swords, then have one sword and a dagger, then would magically have the bow and arrows again, only to have them disappear after shooting an arrow and starting to run without actually dropping the bow. And all the ninjas that it looks like Cole is killing during his test are magically okay despite being run through with a sword or having throwing stars stuck in their forehead.
Of course, nothing in the movie is all that realistic, and it presents a very over-the-top and exaggerated representation of ninjutsu (which is a real style of martial arts). But it is not really a movie that you watch because you are looking for it to make sense, have great acting, or for the continuity. For many people who were kids in the 80s and into martial arts, this will absolutely be a blast from the past (even if you notice the flaws you did not notice then). Ultimately, if you can accept it for what it is, it is entertaining, even if it is in a Mystery Science Theater 3000 "so bad it's good" way and worth checking out in 4k.
