The landlord of a boarding house in 1923 Tokyo, is keen on spying on the bizarre close encounters taking place beneath his roof. One day he sees a prostitute killing a customer, and decides he’s found his soulmate.
Watcher in the attic is based on Edogawa Rampo’s novel. This film, like several others that year, was made to celebrate Rampo’s 100th birthday. Noboru Tanaka has made a roman porno based on the same novel in 1976 was credited with being one of the first films to break down the barriers with regards to the showing of full frontal nudity in Japanese cinema.