ウルフガイ 燃えろ狼男 (1975)

Akira Inugami is the only survivor of a clan of ancient werewolves who relies on his supernatural powers to solve mysterious crimes. After a series of bloody killings perpetrated by an unseen force, Inugami uncovers a conspiracy involving a murdered cabaret singer, corrupt politicians, and a plot by the J-CIA to harvest his blood in order to steal his lycanthropic powers.