The Bloodthirsty Trilogy

Triple bill of Japanese horrors directed by Michio Yamamoto.

In 'The Vampire Doll' (1970), when a young man goes missing while staying at a remote country home, his sister and her boyfriend set out on a perilous mission to find him.

In 'Lake of Dracula' (1971) a doctor suspects a vampire is responsible for a number of murders at a lakeside resort.

Finally, in 'Evil of Dracula' (1974) a teacher gets a job at a girl's school but quickly suspects there may be more to the principal than he originally thought.