In Japan, many are virgins
[A] survey of unmarried people aged 18 to 34 found that around 42 per cent of men and 44.2 per cent of single women had never had sex. … The last time the study was conducted in 2010, only 36.2 per cent of men and 38.7 percent of women said they were virgins.
That’s a lot different than the United States where virginity in that age group is so rare it can be considered deviant behavior.
I believe that HBD is responsible for the difference, and that the Japanese genotype is unable to deal with modern times which call for marriage being delayed until young people are finished with their education and have a career track. But don’t worry about the Japanese race dying out, what will happen is that natural selection will cause a vast increase in Japanese sex drive after a few generations like this. If you want to know what Japan will be like in two hundred years, you need to look at how the minority of Japanese who are actually having a lot of children differ from the rest of their society.