Fake Nationality: The actors playing the World Ninjas. Notice how they're always in costume — and how their costumes cover their entire bodies. However, they did manage to get an American to play Rocket Man in a Vietnam flashback though, while Rainin Wild's suit actor was originally a black man before he was switched with a tanned Japanese stuntman.
Fake Shemp: Junichi Haruta was unavailable after his only episode in the series. As a result, all of Kazenin Mafūba's later appearances were played by a costumed stuntman dubbed by Atsuo Mori (who was also the voice of Baron Owl).