Analysis of information sources in references of the Wikipedia article "Sexuality in Japan" in English language version.
Since the mid-1960s, pink eiga have been the biggest Japanese film genre... By the late 1970s the production of pink eiga together with Roman Porno amounted to more than 70% of annual Japanese film production.
{{cite book}}: CS1 maint: publisher location (link)Japanese Shintoism was principally concerned with propitiatory rites and ceremonies; its mythology fostered nationalism through the cult of divine emperors, but it had no special code of morals and seems to have regarded sex as a natural phenomenon to be enjoyed with few inhibitions. Phallic shrines dotted the countryside. Premarital virginity was not rigidly insisted upon, and freeborn boys did not lose status if they had adult lovers. Early law codes penalized incest and bestiality but not homosexual relations. The gods of the Shinto pantheon were themselves highly sexual. In later times, some of them were seen as "guardian deities" of male love.
Japanese Shintoism was principally concerned with propitiatory rites and ceremonies; its mythology fostered nationalism through the cult of divine emperors, but it had no special code of morals and seems to have regarded sex as a natural phenomenon to be enjoyed with few inhibitions. Phallic shrines dotted the countryside. Premarital virginity was not rigidly insisted upon, and freeborn boys did not lose status if they had adult lovers. Early law codes penalized incest and bestiality but not homosexual relations. The gods of the Shinto pantheon were themselves highly sexual. In later times, some of them were seen as "guardian deities" of male love.
Since the mid-1960s, pink eiga have been the biggest Japanese film genre... By the late 1970s the production of pink eiga together with Roman Porno amounted to more than 70% of annual Japanese film production.