From The Economist:
In Japan the age at which men lose their virginity has always been high. It has remained so: in 2022, 42% of men in their 20s said they had never had sex, while 17% of those in their 30s were virgins, too. A government report from 2022 found that 40% of men had never been on a date.
My guess is this then sets off feedback loops that only make the problem worse, and separating cause and effect isn’t that clear cut.