Gosh, I remember that movie!!
From IMDB:
Warning From Space (1956) You’ll rarely see a movie as crazy as this one. Man-sized aliens shaped liked starfish are trying to warn Earthlings about something. But, earth people always run like the dickens when they see these wacked looking Starfish-from-Space (The gigantic eye dead-center in this costume doesn’t help much) The starfish guys use scientific means to make one of them appear like a human being- a duplicate of a popular dance Tokyo hall actress. It seems that there is a runaway planet about to collide with Earth, and the starfish planet, so the scientists from both planets have to band together and figure out a way to blast the demon star. Everything is here- sneering Yakuza are out to kidnap the scientists, a bizarre cowboy-and-geisha musical number figures into the plot and the fate of the world seems to be decided in an elementary school. You’ll definitely be going “What the holy …..?!” with this movie, but boy, will you have a blast doing so!
It actually was a fun movie, and the Star People were good, taking a big chance coming here. Our first line of defense: Poke 'em in the eye!