Nuns That Bite (1977)
Original title: 女獄門帖 引き裂かれた尼僧
Nuns That Bite is a 1977 Japanese-language horror movie directed by Yuji Makiguchi, with a running time of 1h 9m. It stars Haruka Tajima, Hiromi Maya and Kaori Serita.
A woman on the run is raped, rescued, then raped again. Escaping, she heads for the hills and finds safe haven at a convent. After becoming a postulant (trainee nun), she catches her fellow sisters engaging in lesbianism, fighting over nothing, hurling snakes at each other, and engaging in mild flesh eating.