Das Todesduell der Ninja (1987)

"Evil ninja leader Victor steals the coveted black ninja warrior from Charles but gets wounded in the process. Taking refuge at his friend Roger's house, his authority is challenged by a young man named Jimmy who has come to avenge his father's murder. Victor sends his henchmen after Jimmy, however Charles comes to his aid. Together, the two team up in order to retrieve the black ninja warrior and achieve the ultimate revenge." - VHS Back of the box description. A Hong Kong cut and paste edit of the 1983 Thai Film "เหยี่ยวดง" (Forest Hawk) with new ninja scenes.