Henshin Ninja Arashi first aired just under a month after P Production's Kaiketsu Lion Maru began, Both series are set in feudal Japan, both featured magic ninjas who ride a horse. Except Lion Maru is based a lion and his horse is actually a Pegasus (it has wings) and can fly) while Arashi's is based on an eagle and his horse is just a horse. Kaiketsu Lion Maru lasted longer, running for 54 episodes and spawning a sequel. Henshin Ninja Arashi ran for 46 episodes. no sequel.
This series initially planned to have a three-episode crossover featuring Kamen Rider, but it was scrapped.