"Prince of Space" is an Anglicised condensation of two Japanese tokusatu films ("Planet Prince" and "Planet Prince - The Terrifying Spaceship", both 1959) that were in turn feature length versions of a 1958 kid's television series. The film finds Earth being threatened by Dictator Phantom of the Planet Krankor, a beaked, gloating alien who never misses the opportunity for a sinister laugh, as he flies menacingly above our cities in his flagship (which also seems to be his only ship). Opposing him is the "Prince of Space", an apparently indestructible masked hero in a sub-compact flying saucer. Cheered on by the genre's ubiquitous kids, the Prince of Space retrieves stolen plans, battles Phantom's inept minions including a spongy looking giant with huge ears, and rescues a group of somewhat hapless Earth scientists. The special effects are limited to the two spaceships (Earth's ship never gets off the ground), Phantom's base on Krankor (and the eerie giant that defends it), and some limited pyrotechnics, all of which are pretty underwhelming. Silly fun if you're a fan of this sort of thing but neither as imaginative nor as entertaining as 1961's "Invasion from a Planet" (featuring 'Starman') or 1965's "Invaders from Space" (featuring 'Space Chief'), which have similar aetiologies. For viewers who can't take this kind of silliness straight-up, the film has been riffed on both 'MST3K' and 'Cinema Insomnia'.

...was how Crow described "Yusei oji" (called "Prince of Space" in English) when Pearl made him, Mike and Servo watch it on "Mystery Science Theater 3000". Full of ridiculous dialog and obviously phony sets, it's easily one of the most laughable movies that they ever had to watch. The plot centers on a race of aliens trying to take over Earth, but a good guy from outer space comes and saves the world. Conveniently, their weapons have no effect on him (he even notes this several times).So, the movie alone is a total stinker, but the "MST3K" version is 10/10. You're sure to like it.

I saw this on Mystery Science Theatre 3000. I've never laughed so hard in my life, and that's no exaggeration. This is 110% cheese, at it's very best. The overdubbing of English voices is hilarious. Everything about this movie is ridiculous, from the cheesy makeup, to the cheesy laughs, to the same lines used over....and over....and over. And I thought my eardrums were going to bleed after hearing that horrible 'spaceship' sound effect used nearly 1000 times throughout the film. This movie is so bad, it's hilarious. I was able to catch this on MST3K, and they do a wonderful job of just ripping it a new one. The children in this movie are so...so robotic. Horribly amusing. Or maybe just amusingly horrible. You be the judge.Give it a watch.

Man, how many times can one say "Your weapons have no effect on me"? LOL. "Prince of Space" is without a doubt one of the cheesiest movies on Earth. But it made a great MSTK3 episode. Probably one of my favorites. The villain has the most horrible make-up. He also has one of the most annoying laughs in movie history. If you hear it, your ears eventually feel like they're going to explode. Prince of Space is so beyond cheese, all of his lines get a laugh that were not intended. And the little kids run every where they go. You begin to wonder where their parents are as well. This is fun to watch though. I just love these old Japenese movies with the bad lip dubbing. I think a lot of people would agree too. Watch the MSTK3 episode, it's a good one. The movie is pretty bad, but it's a good bad that I think you'll have fun with. Remember, the weapons have no effect on the Prince of Space. :D1/10 for the movie and 10/10 for the MSTK3 version