There's no doubt in my mind that when we nuked the Japs we set in motion a psyche-altering event that put these people off their feed and off their mattresses.
From the UK Guardian:
I guess we don't have to worry about hearing "Banzai" on the battlefield anymore, or in Japanese bedrooms.Why have young people in Japan stopped having sex?
What happens to a country when its young people stop having sex? Japan is finding out…
Japan's under-40s appear to be losing interest in conventional relationships. Millions aren't even dating, and increasing numbers can't be bothered with sex. For their government, "celibacy syndrome" is part of a looming national catastrophe. Japan already has one of the world's lowest birth rates. Its population of 126 million, which has been shrinking for the past decade, is projected to plunge a further one-third by 2060.
[...]The number of single people has reached a record high. A survey in 2011 found that 61% of unmarried men and 49% of women aged 18-34 were not in any kind of romantic relationship, a rise of almost 10% from five years earlier. Another study found that a third of people under 30 had never dated at all. (There are no figures for same-sex relationships.) Although there has long been a pragmatic separation of love and sex in Japan – a country mostly free of religious morals – sex fares no better. A survey earlier this year by the Japan Family Planning Association (JFPA) found that 45% of women aged 16-24 "were not interested in or despised sexual contact". More than a quarter of men felt the same way.
‘I find women attractive but I’ve learned to live without sex. Emotional entanglements are too complicated’: Satoru Kishino, 31.Sad, very sad. No desire to have a family, no interest in long term feminine companionship. I guess life is easier and less complicated without having a woman involved, but it certainly is less interesting. Oh, wait....