Dear Japan (and Northern Europe, etc.):
Instead of encouraging your citizens to make more babies in an overpopulated world, why not support healthy orphanages and education in impoverished countries, advocate ethical adoption of people from those places by your own people, fight racism at home, and thereby change the shape of your own demographics (so there will be young people to support your currently aging populations) without increasing global population?
Sure, it will dilute your racial stocks, but culture is learned, and you can raise a baby from Somalia or Bangladesh or Peru in your native cultures just fine.
Mary
The Geologic Podcast Episode #894
4 hours ago