Fake Nationality: Hong Kong Robin Shou and Korean American Soon Tek-Oh as Japanese Gobei and Sensei, respectively.
Old Shame: Chris Farleyhated this movie as it arguably attributed to the exploitation of his manic, physical humor by dumbing it down and playing it out to an almost tiring and foolish degree. In fact, he cried on one of the producers' shoulder as a result, as well as leaving the movie's premiere in tears. It's also said to have been what kicked off his fatal drug binge later that year.
Co-writer Mitch Klebanoff penned a script for a sequel a decade later. It ended up getting filmed, though they decided against connecting it to Beverly Hills Ninja halfway through and it got renamed as Dancing Ninja.