Alien Vs Ninja!

In ancient Japan, the fiercest ninjas of the Iga clan face their toughest enemies - and they aren't from this planet! A fiery mass crashes in the forest and soon horrifyingly savage creatures reduce the warriors to tasty snacks. But these jerks from outer space have bitten off more than they can chew. The ninjas' swords and throwing stars may fail against the unearthly goons, but their skills don't stop at sharp stuff. (official distributor synopsis)