Enter the Ninja is a 1981 American martial arts film directed by Menahem Golan and starring Franco Nero, Susan George, Sho Kosugi and Christopher George. The film is about a martial artist named Cole (Nero) who is visiting his friend Frank in the Philippines. On arrival, Cole learns that his friend is being harassed by the wealthy businessman Charles Venarius who wants Frank's land for the oil underneath. Frank and his wife are continuously thwarted by Cole who defends them with his martial arts skills. Learning of Cole's presence, Venarius hires his own ninja (Kosugi). The film was originally intended to be directed by Emmett Alston and to star Mike Stone. Early in the production, Alston was replaced by Golan but stayed on as 2nd unit director, and Stone was replaced with Nero, but stayed on as fight double and fight/stunt coordinator. Since its release, Enter the Ninja attracted a cult following. The film began a craze of ninja-themed Hollywood films during the early 1980s and was the first film in Cannon Films' Ninja Trilogy, an anthology series which includes Revenge of the Ninja (1983) and Ninja III: The Domination (1984). The film launched the career of Sho Kosugi, who went on to play the leading role in both the film's sequels, while also starring in other 1980s ninja-themed films and television shows such as The Master (1984). Plot Cole, a Mercenary and veteran of the Angolan Bush War, completes his ninjutsu training in Japan. Cole goes to visit his war buddy Frank Landers and his newlywed wife Mary Ann Landers, who are the owners of a large piece of farming land in the Philippines. Cole soon finds that the Landers are being repeatedly harassed by Charles Venarius, the wealthy CEO of Venarius Industries, in order to get them to sell their property because, unbeknownst to them, a large oil deposit is located beneath their land. Cole thwarts the local henchmen Venarius has hired to bully and coerce the Landers. Cole and Frank infiltrate Venarius' base, and defeat a number of his henchmen. In the aftermath, Frank gets drunk and confesses to Cole that he is impotent. Mary Ann comes to Cole that night and they have an affair. Venarius, learning that Cole is a ninja, hires a ninja of his own to eliminate Frank and Cole - Hasegawa, who is a rival of Cole from their old training days.