About a quarter of the Japanese population between 18 and 39 were estimated in a study in 2015 to have no heterosexual intercourse. This number is higher than the previous study with showed 20 percent now having intercourse about two decades ago.
The University of Tokyo and Karolinska Institutet wrote and article for the UK medical journal, BMC Public Health and that number had risen among Japanese men to 25.8 percent in 2015 from 20 percent in 1992. For women the number is 24.6 percent, up from 21.7 percent in the same period.
These numbers are based a fertility survey conducted by the National Institute of Population and Social Security Research (NIPSSR). These numbers are not surprising given the social structure of the country and the inability for people in their late 20s and 30s to meet others.
The proportion of virgins grew smaller with age but among people from 35 to 39 ,there were 9.5 percent (men) and 8.9 percent (women) who had no experience with heterosexual intercourse, nearly double the 1992 survey.
The annual income has a lot to do with it. The number of men who have no experience with women, especially men who made 2.7 million yen or lower, jump dramatically. The current fertility stood at 1.43 in 2017, and this is of course below the replacement rate for the country.