[4] Wakamatsu worked in several menial jobs, namely as a construction worker, before becoming a yakuza, as "a member of the Yasuma-gumi clan in the Shinjuku ward of Tokyo".

This submission before passing Eirin's review was doubly embarrassing for the government since pink films, though already emerging as the dominant domestic cinematic genre, were not regarded as worthy of critical attention or international export.

[7] The film received an enthusiastic reception at the festival, but Nikkatsu, fearful of governmental retaliatory action, gave it a low-profile domestic release.

Wakamatsu's independent films of the late 1960s were very low-budget, but often artistically done works, usually concerned with sex and extreme violence mixed with political messages.

[9] His first self-produced film was The Embryo Hunts In Secret (胎児が密猟する時, Taiji ga Mitsuryō Suru Toki, 1966), a story of a man who kidnaps, tortures and sexually abuses a woman until she finally escapes and stabs him to death.

While directing many successful and critically praised Pink Films, Wakamatsu also became known for giving young filmmakers their first experience in working in the industry.

[3] In 2011, a new film on the last days of acclaimed novelist and political activist Yukio Mishima, focusing on the stream of events leading to the so-called Ichigaya incident of November 25, 1970, was announced as being on its stage of full completion.