Alien Vs Ninja samurai action movie DVD

Once upon a time in Japan; there was a band of great Ninja warriors led by Yamata called Iga Ninja. One day they witnessed a flash in the sky and a giant roaring ball of flames crashing in the forest. The warriors rushed into the woods in an attempt to identify the mysterious fireball but instead of finding predictable enemies; they were stunned to face never before seen creatures with claws and fangs... the Aliens! Dubbed in English.