- Fake Nationality: Hong Konger Robin Shou and Korean American Soon Tek-Oh as Japanese Gobei and Sensei, respectively.
- Old Shame: Chris Farley hated 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 at the premiere and was still crying when he left. His resulting depression was rumored to have been what kicked off the fatal drug binge later that year.
- Real-Life Relative: Chris Farley's brothers, Kevin and John, appeared in this movie as cops, right before Chris disappears behind the cloud of smoke.
- Relationship Voice Actor: In the Japanese dub, Haru is voiced by Kōzō Shioya, while his "brother" Gobei is voiced by Kazuki Yao. Both actors previously worked together as Mondo Agake and Judeau Ashta in Mobile Suit Gundam ZZ.
- Stillborn Franchise: 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, rendering it a Divorced Installment.
- Wag the Director: Chris Farley only agreed to star in the film if the producers hired his friend Chris Rock, whose career had been slumping at this point in time, as well.
- What Could Have Been: The lead role was originally written with Dana Carvey in mind.
Trivia / Beverly Hills Ninja