A pretty random anime adaptation, that may be a little tough to get into for those who are unfamiliar with the franchise. The setup isn't too complex though and there's enough oddball appeal to make this a fun watch for any unsuspecting cult fan, as long as you don't worry too much about the plot and characters.
Akira finds himself on Nirvana Island, a place that is teeming with vampires and other dark creatures. His brother is also on the island, so is the cure for the condition that has turned most of the inhabitants into monsters. Together with his friends, Akira sets out to save the island from the vampires.
Samurai zombies, giants, vampire soldiers, a giant worm with a woman's face on its side ... there's plenty of fun to be had with the creatures, Watanabe also gives the action scenes some extra flair. The performances are pretty poor though and the CG is dead cheap, but this is a film that compensates its limitations with weird creatures, fast pacing and outrageous action. Good fun, but very pulpy.