About a quarter of people aged 18 to 39 in Japan were estimated to have had no experience of heterosexual intercourse as of 2015, higher than the 20 percent seen more than two decades ago, a team of Japanese and Swedish researchers said Monday.
Researchers at the University of Tokyo and Karolinska Institutet wrote in an article in U.K. medical journal BMC Public Health that the percentage of people with no such experience had risen among men to 25.8 percent in 2015, from 20.0 percent in 1992, and among women to 24.6 percent from 21.7 percent, based on data from a fertility survey conducted by the National Institute of Population and Social Security Research (NIPSSR).
The study polled people at random and covered only heterosexual experience, so presented no data on same-sex experience.