TOKYO -- Call Japan The Incredible Shrinking Country.
Fwer babies mean Japan's population could plunge, by 30 percent in coming decades.
There are many reasons for this demographic freefall. For instance, Japan is all but closed to foreign immigrants.
But young Japanese men are taking some of the blame for Japan's population decline.
Studies show young males are apathetic about dating, and disinterested in sex.
One college student says, "It's not that guys don't like women. But it's just easier and more fun to hang out with other guys."
Another says, "If you want a date, you have to ask the guy out yourself.
Once a male chauvinist paradise, Japan is suddenly the home of assertive women and so-called "grass-feeder" men -- sensitive, even asexual creatures, overshadowed by their female peers.
To see Lucy Craft's full report, click on the video in the player above.