Irezumi (1966)

In this elegant proto-feminist shocker from Yasuzo Masumuro, a woman forced into prostitution wreaks her spidery revenge. A mysterious tattoo artist puts his masterpiece, a human-faced spider, on a kidnapped woman's back. She and her lover are then forced into a conspiracy-born nightmare, where they face the danger of becoming the very evil they seek to escape. With each new bloody incident, the spider's face seems to redden with ever-growing hunger…